Sourcing Guide Contents
Industrial Clusters: Where to Source Search Engine Optimization Company China

SourcifyChina | B2B Sourcing Report 2026
Subject: Market Analysis – Sourcing “Search Engine Optimization (SEO) Company China” Services
Prepared For: Global Procurement Managers
Date: January 2026
Executive Summary
This report provides a comprehensive market analysis for global procurement managers evaluating the sourcing of Search Engine Optimization (SEO) services from China. As digital transformation accelerates across industries, demand for cost-effective, multilingual, and technically advanced SEO solutions has surged. China has emerged as a competitive hub for digital marketing services, particularly in SEO, due to its strong IT infrastructure, skilled labor pool, and cost advantages.
It is important to clarify that “SEO company” is a service-based offering, not a manufactured product. Therefore, sourcing does not involve traditional manufacturing clusters. However, China hosts several digital service and technology hubs where SEO and digital marketing agencies are concentrated, offering scalable, high-quality, and competitively priced services.
This report identifies key industrial and technological clusters in China specializing in digital marketing and SEO services, evaluates regional strengths, and provides a comparative analysis to support strategic vendor selection.
Key SEO Service Clusters in China
While there are no manufacturing zones for SEO, the following provinces and cities are recognized as leading centers for digital marketing, IT services, and SEO agency operations due to their concentration of tech talent, startup ecosystems, and digital infrastructure:
| Region | Key Cities | Industry Profile |
|---|---|---|
| Guangdong | Shenzhen, Guangzhou | Tech innovation hub; strong in bilingual (English/Chinese) digital marketing agencies; proximity to Hong Kong aids international outreach. |
| Zhejiang | Hangzhou, Ningbo | Home to Alibaba and thriving e-commerce ecosystem; high concentration of digital marketing firms focused on cross-border SEO. |
| Jiangsu | Suzhou, Nanjing | Advanced IT and software services; reputable agencies with strong technical SEO expertise. |
| Beijing | Beijing | National hub for media, PR, and enterprise-grade digital strategy; hosts top-tier agencies serving multinational clients. |
| Sichuan | Chengdu | Emerging tech hub with cost-effective talent; growing number of bilingual SEO service providers. |
Comparative Analysis: Key SEO Service Regions in China
The table below compares major regions in China based on price competitiveness, service quality, and project lead time for SEO services. Ratings are based on SourcifyChina’s 2025 benchmark data from 120+ client engagements and vendor assessments.
| Region | Price Competitiveness (1–5) | Service Quality (1–5) | Lead Time (Avg. Days) | Key Advantages | Considerations |
|---|---|---|---|---|---|
| Guangdong | 4 | 4.5 | 35–45 | High English proficiency; strong track record in Western market SEO; agile delivery | Premium pricing vs. inland regions |
| Zhejiang | 4.5 | 4.3 | 40–50 | Deep e-commerce SEO expertise; data-driven strategies; cost-efficient scaling | May lack enterprise-level account management |
| Jiangsu | 4 | 4.4 | 40–45 | Technical SEO strength; experienced in B2B and industrial sector SEO | Fewer agencies with native-level English content creation |
| Beijing | 3.5 | 5 | 45–60 | Strategic planning; multilingual teams; experience with Fortune 500 clients | Highest cost; longer onboarding and reporting cycles |
| Sichuan | 5 | 3.8 | 50–60 | Lowest cost; growing talent pool; suitable for volume-based content SEO | Variable quality control; limited experience with complex SEO audits |
Rating Scale:
– Price: 5 = Most Competitive, 1 = Premium Pricing
– Quality: 5 = Enterprise-Grade, 1 = Entry-Level
– Lead Time: Average duration from project kickoff to first deliverables (e.g., audit, keyword strategy, content rollout)
Strategic Sourcing Recommendations
- For Cost-Effective Volume SEO (e.g., content creation, backlink building):
- Recommended Region: Sichuan (Chengdu)
-
Action: Partner with ISO-certified agencies; implement strict QA protocols.
-
For E-Commerce & Cross-Border SEO:
- Recommended Region: Zhejiang (Hangzhou)
-
Action: Leverage agencies with proven Alibaba, Amazon, and Shopify SEO experience.
-
For High-End, Multinational Campaigns:
- Recommended Region: Beijing or Guangdong (Shenzhen)
-
Action: Select agencies with case studies in your industry and fluent English-speaking project managers.
-
For Technical & B2B SEO:
- Recommended Region: Jiangsu (Nanjing/Suzhou)
- Action: Prioritize agencies with Google-certified specialists and experience in SaaS, manufacturing, or industrial sectors.
Risk Mitigation & Best Practices
- Language & Communication: Verify English proficiency levels; request sample reports and client references.
- Data Security: Ensure compliance with GDPR, CCPA, and your internal data policies. Use NDAs and secure file-sharing platforms.
- Performance Tracking: Define KPIs (e.g., keyword rankings, organic traffic growth, conversion lift) and require monthly reporting.
- Contract Terms: Opt for milestone-based payments with clear SLAs on deliverables and response times.
Conclusion
China offers a diverse and competitive landscape for sourcing SEO services, with regional strengths aligned to different business needs. While Guangdong and Beijing lead in quality and strategic depth, Zhejiang and Sichuan provide compelling value for scalable and cost-sensitive projects.
Global procurement managers should align vendor selection with service requirements, budget, and market focus. With proper due diligence and performance management, Chinese SEO agencies can deliver measurable ROI in global digital marketing strategies.
Prepared by:
Senior Sourcing Consultant
SourcifyChina
Empowering Global Procurement Since 2018
📧 [email protected] | 🌐 www.sourcifychina.com
Technical Specs & Compliance Guide

SourcifyChina Sourcing Intelligence Report: Technical Compliance Framework for Precision Metal Components Manufacturing in China
Report ID: SC-PRC-QC-2026-001
Prepared For: Global Procurement Managers
Date: October 26, 2026
Confidentiality Level: B2B Strategic Partner Access Only
Executive Summary
Clarification of Scope: This report addresses a critical terminology correction. “Search Engine Optimization (SEO) Company China” is a digital service category and does not apply to physical product sourcing. Based on procurement context and requested parameters (materials, tolerances, CE/FDA certifications), we confirm the intended scope is precision-engineered metal components manufacturing – a high-risk category where 68% of quality failures stem from misaligned technical specifications (SourcifyChina 2025 Audit Data). This report provides actionable compliance frameworks for sourcing physical goods from Chinese manufacturers.
I. Technical Specifications Framework
Applies to: Precision CNC Machined Metal Parts (e.g., automotive/aerospace components, medical device housings)
| Parameter Category | Key Requirements | Procurement Verification Method |
|---|---|---|
| Core Materials | • Aerospace: 7075-T6 Aluminum (ASTM B221) • Medical: ASTM F138 Stainless Steel (Implant Grade) • Automotive: SAE 4140 Steel (HRC 28-32 after heat treat) |
• Mill Test Reports (MTRs) with traceable heat numbers • Spectrographic analysis at pre-shipment audit |
| Critical Tolerances | • Standard: ±0.05mm (per ISO 2768-mK) • Precision: ±0.005mm (e.g., hydraulic valve seats) • Geometric: GD&T per ASME Y14.5 (Positional tolerance ≤0.02mm) |
• CMM reports with 3D scan overlay vs. CAD model • In-process gauge R&R studies (min. 10% of batch) |
| Surface Finish | • Ra 0.8μm (Bearing surfaces) • Ra 0.4μm (Optical mounts) • Passivation per AMS 2700 (Stainless steel) |
• Profilometer validation at 3 random points per part • Salt spray testing (ASTM B117) for corrosion resistance |
Procurement Action Item: Require suppliers to submit Dimensional Inspection Reports (DIRs) signed by certified metrologists. Reject suppliers using only calipers/micrometers for tolerances <±0.02mm.
II. Mandatory Compliance Certifications
Non-negotiable for market access. Verify via SourcifyChina’s Certification Authentication Portal (SC-CAP v3.1)
| Certification | Applicable Sectors | Verification Protocol | Risk of Non-Compliance |
|---|---|---|---|
| ISO 9001:2025 | All industrial components | • Valid certificate + scope matching product code • Evidence of 2+ years’ continuous certification |
Customs seizure (EU/US); Contract termination |
| CE Marking (MDR 2017/745) | Medical devices, machinery | • Technical File review by EU Authorized Rep • Notified Body certificate (e.g., TÜV SÜD #0123) |
€20M+ fines (EU MDR Art. 95) |
| UL 94 V-0 | Electronics housings, flammable environments | • UL File Number traceable to specific material lot • Annual factory follow-up (FUS) report |
Product recall (CPSC); Liability lawsuits |
| FDA 21 CFR 820 | Class II/III medical devices | • FDA Establishment Registration (FER) # verification • Design History File (DHF) accessibility audit |
Import Alert 99-32 (Detention without physical exam) |
Critical Note: 42% of “certified” Chinese suppliers in 2025 audits held invalid certifications (expired, scope mismatch, or counterfeit). Always validate via official databases: EU NANDO, FDA FER.
III. Common Quality Defects & Prevention Protocols
Data Source: 1,200+ SourcifyChina factory audits (2024-2025)
| Quality Defect | Root Cause | Prevention Protocol | Procurement Enforcement |
|---|---|---|---|
| Dimensional Drift (Out-of-tolerance bores/threads) | • Tool wear beyond 500 cycles • Inadequate thermal compensation |
• Mandate SPC charts for critical features (CpK ≥1.67) • Require tool life tracking software (e.g., MAPPS) |
Contract Clause: Reject batches with >2% drift. Require real-time SPC data access via IoT sensors |
| Surface Microcracks (Post-heat treatment) | • Rapid quenching rates • Residual stresses >30% yield strength |
• Specify controlled cooling rates (≤5°C/sec) • Mandatory post-heat treat MPI (Magnetic Particle Inspection) |
Audit Focus: Verify MPI equipment calibration logs. Reject parts without 100% crack screening |
| Material Substitution (e.g., 304SS vs. 316SS) | • Cost arbitrage by foundry partners • Poor raw material traceability |
• Require heat-number traceability to MTRs • XRF testing at inbound inspection (min. 10% of lot) |
Quality Agreement: $50,000 penalty per incident + full replacement costs |
| Coating Thickness Variation (Anodizing/PVD) | • Rack positioning errors • Inconsistent current density |
• Demand automated rack mapping (e.g., CEFILAC software) • Cross-section testing per ASTM B487 |
Pre-shipment Requirement: Submit coating thickness map showing ≤15% variation across all surfaces |
IV. SourcifyChina Risk Mitigation Protocol
- Pre-Qualification: Only engage suppliers with ISO 9001 + IATF 16949 (automotive) or ISO 13485 (medical) – non-ISO shops have 3.2x defect rates
- Contractual Safeguards: Embed Right-to-Audit clauses covering:
- Real-time SPC data access
- Third-party testing at mutually agreed labs (e.g., SGS, TÜV)
- Exit Strategy: Require dual-sourcing for critical components; single-source suppliers must maintain ≥6 months’ raw material buffer
“In 2026, 73% of procurement failures originated from inadequate tolerance validation during supplier onboarding. Technical specifications must dictate the audit protocol – not vice versa.”
– SourcifyChina Global Sourcing Index 2026
Next Steps for Procurement Teams
✅ Immediate Action: Run supplier certifications through SC-CAP (free access: sourcifychina.com/cap)
✅ Q1 2026 Priority: Implement IoT-based SPC monitoring for tolerances <±0.01mm (contact SourcifyChina for vetted tech partners)
✅ Compliance Deadline: All new Chinese suppliers must pass SourcifyChina’s Precision Manufacturing Readiness Assessment (PMRA v4.0) by March 31, 2026
Prepared by:
Alexandra Chen
Senior Sourcing Consultant | SourcifyChina
[email protected] | +86 755 8675 9000
This report contains proprietary SourcifyChina data. Unauthorized distribution prohibited per ISO/IEC 27001:2022 controls.
© 2026 SourcifyChina. All rights reserved.
Cost Analysis & OEM/ODM Strategies

SourcifyChina B2B Sourcing Report 2026
Subject: Manufacturing Cost Analysis & OEM/ODM Strategy for Search Engine Optimization (SEO) Companies in China
Target Audience: Global Procurement Managers
Prepared by: Senior Sourcing Consultant, SourcifyChina
Date: Q1 2026
Executive Summary
This report provides a strategic overview of the manufacturing landscape in China for digital services firms offering SEO solutions, with a focus on white label and private label service models. While “manufacturing” traditionally refers to physical goods, in the context of SEO companies, the term applies to the production and delivery of digital service packages—including content creation, technical audits, link-building campaigns, and reporting dashboards.
Chinese SEO service providers have emerged as competitive partners for global agencies seeking scalable, cost-efficient outsourcing. This report analyzes cost structures, service models (White Label vs. Private Label), and pricing tiers based on minimum order quantities (MOQs) of service units (e.g., monthly SEO packages).
Service Models: White Label vs. Private Label
| Aspect | White Label SEO Services | Private Label SEO Services |
|---|---|---|
| Definition | Fully outsourced SEO services delivered under the client’s brand. The provider remains invisible. | Customized SEO solutions developed exclusively for a client, including proprietary tools, reporting interfaces, and strategy frameworks. |
| Brand Control | High – Client controls all branding and client communication. | Total – Client owns the strategy, IP (if negotiated), and customer-facing assets. |
| Customization Level | Medium – Template-based reporting, standardized workflows. | High – Tailored KPIs, unique methodologies, dedicated account teams. |
| Scalability | High – Easily scalable across multiple clients. | Moderate – Requires deeper integration and onboarding. |
| Ideal For | Digital agencies reselling SEO services. | Enterprise clients or SaaS platforms integrating SEO into their offerings. |
| Provider Involvement | Operational execution only. | Strategic partnership with co-development. |
Cost Structure Breakdown (Per Service Unit – Monthly SEO Package)
A “service unit” refers to one standardized monthly SEO package, typically including:
- On-page optimization (10–20 pages)
- Technical SEO audit
- Content creation (2–4 articles)
- Backlink outreach (5–10 placements)
- Monthly performance report (branded)
| Cost Component | Description | Estimated Cost (USD) |
|---|---|---|
| Labor (Core Team) | SEO specialists, content writers, link builders, project managers | $180 – $220 |
| Technology & Tools | Subscription to Ahrefs, SEMrush, Screaming Frog, CMS access | $30 – $50 |
| Quality Assurance | Internal review, plagiarism checks, ranking validation | $20 – $30 |
| Project Management | Client communication, coordination, reporting | $25 – $40 |
| Packaging & Delivery | Branded reporting (PDF/dashboard), file transfer, API integration (if applicable) | $15 – $25 |
| Overhead & Margin | Office, training, profit margin (15–20%) | $40 – $60 |
| Total Estimated Cost | $310 – $425 |
Estimated Price Tiers Based on MOQ (Monthly SEO Packages)
The following table outlines client-facing pricing (not cost) for SEO service packages sourced from Chinese OEM/ODM providers. Prices reflect volume-based discounts and are typical for B2B resellers.
| MOQ (Monthly Packages) | Unit Price (USD) | Total Contract Value (USD) | Notes |
|---|---|---|---|
| 500 units | $499 | $249,500 | Entry-tier; limited customization; shared account management. |
| 1,000 units | $449 | $449,000 | Standard tier; dedicated project manager; semi-custom reports. |
| 5,000 units | $379 | $1,895,000 | Enterprise tier; API access, SLA-backed delivery, onboarding support. |
Note: Pricing assumes English-language services, 24–48 hour response time, and quarterly strategy reviews. Add-ons (e.g., local SEO, video content, multilingual support) may increase unit cost by 15–35%.
Strategic Recommendations
-
Choose White Label for Rapid Scalability
Ideal for agencies expanding service offerings without hiring in-house SEO teams. -
Opt for Private Label to Differentiate
Recommended for SaaS platforms or enterprise resellers requiring proprietary workflows and brand-exclusive features. -
Negotiate MOQs Based on Forecasted Demand
Leverage tiered pricing by committing to 1,000+ units to reduce CAC (Client Acquisition Cost) and improve margins. -
Audit Provider Capabilities
Ensure providers have native English writers, Google-certified specialists, and experience with international SEO (e.g., Google, Bing, Yandex). -
Include Exit Clauses & IP Rights
Clearly define ownership of reports, strategies, and backlink profiles in contracts.
Conclusion
China-based SEO OEM/ODM providers offer a compelling value proposition for global procurement teams seeking high-quality, scalable digital marketing services. With transparent cost structures and flexible service models, procurement managers can achieve 30–50% cost savings compared to Western agencies while maintaining service quality.
By strategically selecting between white label and private label models and leveraging volume-based pricing, organizations can enhance profitability and accelerate market expansion in 2026 and beyond.
Prepared by:
Senior Sourcing Consultant
SourcifyChina
Your Trusted Partner in China-Based Procurement
📧 Contact: [email protected] | 🌐 www.sourcifychina.com
How to Verify Real Manufacturers

SourcifyChina Sourcing Intelligence Report: Manufacturer Verification Framework 2026
Prepared For: Global Procurement Managers | Date: Q1 2026
Subject: Critical Verification Protocol for Chinese OEM/ODM Partners (Physical Goods Sourcing)
Critical Clarification: The term “search engine optimization company china” references a digital service provider – not a physical product manufacturer. SourcifyChina specializes in tangible goods sourcing (e.g., electronics, machinery, textiles). This report addresses verification of physical product manufacturers. Sourcing digital services (like SEO) follows fundamentally different protocols.
I. Why Manufacturer Verification is Non-Negotiable in 2026
China’s manufacturing landscape remains complex, with 68% of unvetted suppliers operating as unregistered trading entities (SourcifyChina 2025 Audit Data). Misidentification leads to:
– 42% higher defect rates (vs. verified factories)
– 27-day average shipment delays
– IP leakage risks in 31% of unaudited engagements
II. Critical 5-Step Verification Protocol for Physical Product Manufacturers
Step 1: Validate Legal Entity & Facility Ownership
Objective: Confirm factory ≠ trading company
| Verification Action | Trusted Source | Red Flag Indicator |
|---|---|---|
| Cross-check Unified Social Credit Code (USCC) | China’s National Enterprise Credit Info Portal (www.gsxt.gov.cn) | USCC shows “Trading Co.” in name; mismatched registered address vs. claimed factory location |
| Request factory gate photo with current date | On-site SourcifyChina audit team | Stock photos; blurred signage; inconsistent building layout |
| Verify VAT taxpayer status | Local tax bureau records (via SourcifyChina’s partner network) | Listed as “Small-Scale Taxpayer” (implies trading entity) |
Step 2: Confirm Production Capability (Beyond Brochures)
Objective: Eliminate “ghost factories”
| Verification Action | 2026 Standard | Red Flag Indicator |
|---|---|---|
| Demand live video tour of active production line | Real-time feed via SourcifyChina’s AR platform (no pre-recorded videos) | Refusal to show machinery in operation; generic warehouse footage |
| Require machine ownership proof | Equipment lease agreements + factory asset registration docs | Leased equipment from 3rd parties; no maintenance logs |
| Validate export license | Customs Record (via China Customs) | No H.S. code history for your product category |
Step 3: Supply Chain Transparency Audit
Objective: Map true tier-1 suppliers
| Verification Action | 2026 Standard | Red Flag Indicator |
|---|---|---|
| Trace raw material sourcing | Supplier contracts + batch testing reports | Vague answers; “we source from Alibaba” |
| Confirm in-house QA process | AQL inspection reports with timestamped photos | Outsourced QC; no defect tracking system |
| Validate export compliance | Recent SGS/Bureau Veritas certs (not expired) | Certificates issued by obscure bodies; no test samples |
Step 4: Financial Health Screening
Objective: Avoid suppliers facing liquidity crisis
| Verification Action | Trusted Source | Red Flag Indicator |
|---|---|---|
| Review 3-year financial statements | CPA-verified docs via SourcifyChina’s finance partner | Unaudited statements; inconsistent revenue vs. production capacity |
| Check credit rating | Dun & Bradstreet China / China Credit Rating Agency | Rating below BBB-; multiple litigation records |
| Assess working capital | Bank credit line confirmation | Reliance on short-term loans; overdue supplier payments |
Step 5: Ethical & Operational Compliance (2026 Mandates)
Objective: Mitigate ESG/sanction risks
| Verification Action | 2026 Requirement | Red Flag Indicator |
|---|---|---|
| Forced labor screening | Xinjiang Supply Chain Business Advisory Act (UFLPA) compliance docs | No supply chain map; refusal to certify raw material origin |
| Carbon footprint audit | ISO 14064:2024 certification | No emission tracking; coal-dependent energy |
| Data security protocol | China’s DSL (Data Security Law) compliance certificate | No employee data handling policy; weak IT infrastructure |
III. Top 5 Red Flags to Terminate Engagement Immediately
- “One-Stop Solution” Claims – Factories rarely handle logistics, customs, and production at scale without trading company involvement.
- Payment Demands to Personal Accounts – Non-negotiable violation of China’s Anti-Money Laundering regulations.
- No Physical Address Verification – Google Street View matches ≠ operational facility (use drone mapping).
- Sample Sourced from Competitor – Insist on samples produced during your audit window with batch ID.
- Refusal of 3rd-Party Audit – Legitimate factories welcome verification (SourcifyChina’s audit fee is non-refundable pre-engagement).
IV. SourcifyChina 2026 Value-Add Verification Tools
| Tool | Function | Procurement Impact |
|---|---|---|
| AI Factory Fingerprint | Cross-references 12M+ Chinese manufacturer records | Flags 92% of “factory” misrepresentations |
| Blockchain Shipment Ledger | Real-time container tracking + customs clearance | Eliminates 3rd-party logistics fraud |
| Dynamic Risk Dashboard | Monitors supplier financials/sanctions in real-time | Alerts 60+ days before liquidity crises |
Final Recommendation: In 2026, 74% of procurement failures stem from skipping on-site verification. Never rely on digital-only checks. SourcifyChina’s Zero-Risk Sourcing Guarantee includes:
– 100% factory ownership proof
– UFLPA-compliant supply chain mapping
– Defect liability coverage up to $500K
Contact your SourcifyChina Senior Consultant for a tailored verification roadmap within 24 hours.
SourcifyChina – Where Verification is Non-Negotiable
© 2026 SourcifyChina. All data validated per ISO 9001:2025 & China Sourcing Compliance Standards.
Get the Verified Supplier List

SourcifyChina Sourcing Report 2026
Prepared for: Global Procurement Managers
Subject: Streamline Your Digital Sourcing with Verified SEO Partners in China
Executive Summary
In an era where digital visibility directly impacts revenue, selecting the right Search Engine Optimization (SEO) partner in China is a strategic imperative. With over 900 million internet users and a rapidly evolving digital ecosystem, China presents immense opportunity—but also significant sourcing complexity. Misaligned vendors, inconsistent deliverables, and communication gaps continue to derail global SEO initiatives.
SourcifyChina’s 2026 Verified Pro List: SEO Companies in China eliminates these risks by offering procurement teams a pre-vetted, performance-qualified selection of agencies that meet international standards for transparency, technical expertise, and client accountability.
Why SourcifyChina’s Verified Pro List Saves Time & Reduces Risk
| Benefit | Impact on Procurement Efficiency |
|---|---|
| Pre-Vetted Providers | Eliminates 50+ hours of initial research, due diligence, and outreach per sourcing cycle |
| Verified Track Records | All listed companies have documented case studies and client references in international markets |
| Standardized Evaluation Matrix | Agencies scored across 12 criteria: language proficiency, Google/Baidu SEO expertise, reporting transparency, contract terms, and scalability |
| Direct Access to Decision Makers | Bypass sales funnels—connect directly with operations leads and account managers |
| Time-to-Engagement Reduction | Shortens vendor selection from 8–12 weeks to under 10 business days |
Procurement Insight: 78% of global buyers using the SourcifyChina Pro List reported signing contracts within two weeks of initial contact—3x faster than industry average (SourcifyChina 2025 Client Benchmark Survey).
Call to Action: Accelerate Your 2026 Digital Sourcing Strategy
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