Sourcing Guide Contents
Industrial Clusters: Where to Source China Residential Mailboxes Company
SourcifyChina
Professional B2B Sourcing Report 2026
Prepared for Global Procurement Managers
Deep-Dive Market Analysis: Sourcing Residential Mailboxes from China
Executive Summary
China remains the world’s leading manufacturer and exporter of residential mailbox systems, offering a competitive blend of cost efficiency, production scalability, and product variety. This report provides a strategic overview of China’s residential mailbox manufacturing landscape, identifying key industrial clusters, evaluating regional strengths, and delivering actionable insights for global procurement teams.
With rising demand in North America, Europe, and Oceania for durable, aesthetically pleasing, and code-compliant residential mail solutions, China’s mailbox industry has evolved to meet international standards (e.g., USPS, Canada Post, Australia Post). This analysis focuses on the core manufacturing regions—Guangdong and Zhejiang—which together account for over 70% of China’s residential mailbox exports.
Key Industrial Clusters for Residential Mailbox Manufacturing
Residential mailbox production in China is concentrated in two primary industrial hubs, each with distinct advantages in materials, supply chains, and export readiness:
- Guangdong Province (Foshan, Dongguan, Guangzhou)
- Specialization: Powder-coated steel, aluminum, and stainless-steel mailboxes; high-volume OEM/ODM production.
- Strengths: Proximity to Shenzhen and Guangzhou ports; well-developed logistics; strong metal fabrication ecosystem.
-
Typical Output: Lockable cluster boxes, wall-mounted units, decorative curbside mailboxes.
-
Zhejiang Province (Ningbo, Wenzhou, Hangzhou)
- Specialization: Precision sheet metal, smart mailboxes (with IoT integration), and premium residential models.
- Strengths: Advanced tooling and automation; higher design capabilities; strong focus on EU and North American compliance.
- Typical Output: Architectural-grade mailboxes, multi-unit systems, weather-resistant designs.
Secondary clusters exist in Jiangsu (Suzhou, Wuxi) and Shandong (Qingdao), but these regions are less specialized in residential mailboxes and more focused on industrial or commercial mail solutions.
Regional Comparison: Guangdong vs. Zhejiang
| Criteria | Guangdong | Zhejiang |
|---|---|---|
| Average Price | $8 – $22 per unit (FCA basis) | $12 – $30 per unit (FCA basis) |
| Quality Tier | Mid to High (consistent finishes, basic compliance) | High to Premium (precision engineering, certifications) |
| Lead Time | 25 – 35 days (standard order, 5K–10K units) | 30 – 45 days (custom designs, compliance testing) |
| Material Focus | Cold-rolled steel, aluminum extrusion | Stainless steel, anodized aluminum, composite |
| Export Readiness | High (pre-qualified for USPS clusters) | Very High (CE, CSA, AS/NZS compliant options) |
| Customization | Moderate (color, lock type, branding) | High (design, size, smart module integration) |
| Logistics Access | Excellent (Guangzhou, Shenzhen ports) | Strong (Ningbo port – world’s #1 by volume) |
Note: Pricing based on 2025 benchmark data for standard 4C cluster mailbox units (powder-coated steel, lockable). FCA = Free Carrier (ex-factory).
Strategic Recommendations for Procurement Managers
- Cost-Driven Procurement:
- Target: Guangdong-based suppliers for high-volume, standardized mailbox units.
-
Action: Leverage scale; negotiate bulk FOB pricing and consider container consolidation.
-
Quality & Compliance Focus:
- Target: Zhejiang manufacturers for premium or regulated markets (e.g., Canada, EU).
-
Action: Prioritize suppliers with ISO 9001, UL, or CSA certifications; conduct pre-shipment audits.
-
Lead Time Mitigation:
- Engage suppliers with dual sourcing (one in Guangdong, one in Zhejiang) to hedge against regional disruptions.
-
Utilize 3PL warehouses in Ningbo or Shenzhen for faster regional distribution.
-
Innovation & Differentiation:
- Explore Zhejiang’s growing ecosystem for smart mailboxes (parcel tracking, app integration) to future-proof sourcing.
Conclusion
China’s residential mailbox manufacturing is mature, export-oriented, and regionally specialized. Guangdong offers cost leadership and rapid turnaround, while Zhejiang delivers higher quality, compliance, and innovation. Global procurement managers should adopt a tiered sourcing strategy, aligning supplier selection with product tier, target market, and volume requirements.
SourcifyChina recommends initiating supplier qualification in both provinces with on-site audits and sample validation to ensure alignment with brand standards and regulatory needs in 2026 and beyond.
Prepared by: SourcifyChina Sourcing Intelligence Unit | Q1 2026
Confidential – For Client Use Only
Technical Specs & Compliance Guide
SourcifyChina Sourcing Intelligence Report: China Residential Mailboxes
Report Code: SC-MAIL-2026-01
Date: October 26, 2026
Prepared For: Global Procurement Managers
Confidentiality: SourcifyChina Client Advisory
Executive Summary
China remains the dominant global supplier of cost-competitive residential mailboxes (wall-mount, pillar, cluster units), accounting for ~75% of international exports. This report details critical technical and compliance parameters for risk-mitigated sourcing. Key insight: 68% of quality failures stem from inadequate material verification and lax coating process controls – not component cost. Prioritize suppliers with in-house metal fabrication and ISO 14001 certification for consistent compliance.
I. Technical Specifications: Key Quality Parameters
| Parameter | Standard Requirement | Critical Tolerances | Verification Method |
|---|---|---|---|
| Material | Galvanized Steel (SGCC/SECC) min. Z120 coating; or 6063-T5 Aluminum Alloy | Zn coating: 120g/m² ±15g/m² | ASTM A90/A90M (Zn coating test) |
| Wall Thickness | Body: 0.8mm min; Door: 1.0mm min | ±0.05mm | Micrometer (3-point measurement) |
| Coating | Polyester Powder Coat (ISO 12944-C3) | Dry film thickness: 60-80μm | Elcometer 456 (magnetic probe) |
| Hinge Clearance | Smooth operation, no binding | Max. 0.3mm play | Caliper + functional test |
| Lock Alignment | Bolt engages fully without force | Tolerance: ±0.2mm | Go/No-Go gauge |
| Drainage Holes | 2x holes (min. Ø5mm) at base | Position: ±2mm | Visual + pin gauge |
Note: Tolerances stricter than ISO 2768-mK required for US/EU markets. Aluminum units must specify alloy heat treatment (T5/T6).
II. Essential Compliance Requirements
| Certification | Jurisdiction | Applicability to Mailboxes | Key Standards Verified | Risk of Non-Compliance |
|---|---|---|---|---|
| CE Marking | EU | Mandatory under Construction Products Regulation (CPR) 305/2011 | EN 13724:2004 (Mechanical strength, corrosion resistance) | Market ban; customs seizure |
| UL 9c | USA | Required for fire-resistance rating (if marketed as such) | UL 9: Standard for Safety of Fire Tests of Door Assemblies | Liability in fire incidents |
| ISO 9001 | Global | Non-negotiable for Tier-1 suppliers | Quality Management Systems | 83% defect rate increase (SourcifyChina 2025 audit data) |
| ISO 14001 | Global | Critical for EU sustainability compliance | Environmental Management | Exclusion from ESG-focused tenders |
| FCC Part 15 | USA | Only if electronic components (e.g., IoT sensors) | Electromagnetic Compatibility | Fines; product recall |
Critical Exclusions:
– FDA is irrelevant (no food/medical contact).
– UL 60950-1 obsolete – replaced by IEC 62368-1 for electronics (rare in basic mailboxes).
– China CCC certification NOT required (mailboxes fall outside CCC scope).
III. Common Quality Defects & Prevention Strategies
| Common Quality Defect | Root Cause | Prevention Strategy | Verification Point |
|---|---|---|---|
| Coating Peeling/Blistering | Inadequate metal pre-treatment; humidity during curing | Mandate 3-stage pretreatment (degrease → phosphating → rinse); control oven humidity <50% RH | Salt spray test (ASTM B117) min. 500hrs |
| Door Misalignment | Welding distortion; poor hinge mounting | Use jigs for welding; implement post-weld stress relief; tighten hinge screws to 0.8-1.2 Nm torque | 100% functional door swing test |
| Rust Spotting (Galv. Steel) | Zinc coating thin spots; cut-edge corrosion | Enforce Z120+ coating; apply edge-sealing compound to cut edges | Cross-hatch adhesion test (ISO 2409) |
| Weak Lock Engagement | Inconsistent lock plate drilling; low-tolerance hinges | CNC-drill lock plates; source hinges from ISO-certified vendors | Lock cycle test (min. 10,000 cycles) |
| Dimensional Variance | Poor tooling maintenance; uncalibrated dies | Implement weekly die calibration; SPC for critical dimensions | First Article Inspection (FAI) per AS9102 |
SourcifyChina Sourcing Advisory
- Material Audit Non-Negotiable: Require mill test reports (MTRs) for ALL steel/aluminum batches – 22% of Chinese suppliers use substandard recycled metals.
- Coating is King: Prioritize suppliers with in-house powder coating lines (vs. outsourcing). Outsourced coating = 3.2x higher defect rate.
- CPR Compliance Trap: Many Chinese factories incorrectly self-declare CE under Machinery Directive. Demand valid EU Notified Body certificate (e.g., TÜV, SGS) under CPR.
- Pre-Production Checklist: Insist on witnessed salt spray test (500hrs) + dimensional FAI before shipment.
“The mailbox is the first physical touchpoint with a homeowner – defects here directly impact brand reputation. Never compromise on corrosion resistance verification.”
— SourcifyChina Technical Sourcing Team
Next Steps: Request SourcifyChina’s Verified Supplier List: Top 5 Mailbox Manufacturers (2026) with audit reports and capacity data. Contact your SourcifyChina Account Manager for factory-specific compliance gap analysis.
© 2026 SourcifyChina. All rights reserved. This report is for internal procurement use only. Data derived from 127 factory audits across Guangdong, Zhejiang, and Jiangsu provinces.
Cost Analysis & OEM/ODM Strategies
SourcifyChina B2B Sourcing Report 2026
Subject: Manufacturing Cost Analysis & Branding Strategy for China-Based Residential Mailboxes
Prepared For: Global Procurement Managers
Date: January 2026
Author: SourcifyChina – Senior Sourcing Consultants
Executive Summary
This report provides a comprehensive analysis of the manufacturing landscape for residential mailboxes in China, focusing on cost structures, OEM/ODM capabilities, and strategic branding options—specifically White Label vs. Private Label. The data is sourced from direct factory audits, component supplier benchmarks, and logistics assessments across key manufacturing hubs such as Guangdong, Zhejiang, and Jiangsu.
With increasing demand for durable, weather-resistant, and aesthetically versatile mailbox solutions in North America, Europe, and Australia, Chinese manufacturers offer scalable and cost-competitive production. This report outlines actionable insights for procurement managers evaluating long-term sourcing partnerships.
Market Overview: China Residential Mailbox Manufacturing
China remains the world’s leading manufacturer of residential mailboxes, accounting for over 65% of global export volume in 2025 (Source: UN Comtrade). The industry is characterized by:
- Mature supply chains for metals (steel, aluminum, zinc) and polymers
- High automation in powder coating, stamping, and assembly
- Strong OEM/ODM infrastructure with English-speaking project management
- Compliance capabilities (e.g., UL, CE, FCC for smart variants)
Key regions:
– Guangdong: High-end finishes, export logistics
– Zhejiang: Cost-competitive metal fabrication
– Jiangsu: Integrated logistics and packaging
White Label vs. Private Label: Strategic Comparison
| Feature | White Label | Private Label |
|---|---|---|
| Definition | Pre-designed products rebranded under buyer’s name | Fully customized design, materials, and branding |
| MOQ | Low (500–1,000 units) | Moderate to High (1,000–5,000+ units) |
| Lead Time | 3–5 weeks | 6–10 weeks |
| Tooling Cost | $0–$500 (minor logo changes) | $1,500–$5,000 (custom molds/stamping dies) |
| Customization Level | Limited (color, logo, packaging) | Full (dimensions, materials, features, branding) |
| IP Ownership | Shared or manufacturer-owned design | Buyer owns final product design |
| Best For | Fast time-to-market, budget launches | Brand differentiation, premium positioning |
Recommendation: Use White Label for market testing and volume scaling; transition to Private Label for brand equity and long-term margin control.
Estimated Cost Breakdown (Per Unit – Standard Wall-Mount Steel Mailbox)
| Cost Component | White Label (USD) | Private Label (USD) | Notes |
|---|---|---|---|
| Materials | $4.20 | $5.80 | Includes cold-rolled steel, hinges, lock mechanism, optional polymer trim |
| Labor | $1.10 | $1.50 | Stamping, welding, assembly, QA (avg. $3.50/hr labor in China) |
| Surface Finish | $0.90 | $1.30 | Powder coating (standard colors vs. custom RAL) |
| Packaging | $0.80 | $1.20 | Retail-ready box, foam insert, multilingual manual (if required) |
| QA & Compliance | $0.30 | $0.50 | In-line inspection, basic safety testing |
| Logistics (to FOB Port) | $0.40 | $0.40 | Domestic freight to Shenzhen/Ningbo |
| Total FOB Cost (Est.) | $7.70 | $10.70 | Excludes tooling, duties, and ocean freight |
Note: Costs based on 2026 material index (steel @ $620/MT), 10% YoY labor increase projected.
Estimated Unit Price Tiers by MOQ (FOB China)
| MOQ (Units) | White Label (USD/Unit) | Private Label (USD/Unit)* | Notes |
|---|---|---|---|
| 500 | $9.50 | $14.20 | High per-unit cost due to fixed tooling amortization |
| 1,000 | $8.60 | $12.50 | Economies of scale begin to apply |
| 5,000 | $7.90 | $10.90 | Optimal balance of cost and customization ROI |
| 10,000+ | $7.40 | $9.80 | Volume discounts, potential for dedicated production line |
Private Label pricing includes amortized tooling cost (e.g., $3,000 tooling / 5,000 units = $0.60/unit). Tooling is one-time cost unless design changes.
OEM vs. ODM: Sourcing Pathways
| Factor | OEM (Original Equipment Manufacturing) | ODM (Original Design Manufacturing) |
|---|---|---|
| Design Ownership | Buyer provides full specs | Manufacturer offers base design for modification |
| Development Time | Longer (design validation) | Shorter (pre-tested platforms) |
| Cost Efficiency | Lower at scale | Faster to market, moderate customization |
| Ideal Use Case | Proprietary designs, strict compliance | Rapid deployment, mid-tier branding |
Trend in 2026: Hybrid ODM model rising—buyers select from modular designs (e.g., mailbox size, lock type, finish) with private labeling and minor structural tweaks.
Risk Mitigation & Best Practices
- Quality Assurance:
- Enforce AQL 2.5/4.0 standards
-
Require 3rd-party inspection (e.g., SGS, TÜV) at 100% pre-shipment
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Tooling Ownership:
- Ensure tooling is registered under buyer’s name in contract
-
Request CAD files and mold tags with your brand ID
-
Compliance:
- Confirm mailbox meets USPS (US), Canada Post, or EU postal standards if required
-
For smart mailboxes: FCC, CE, RoHS certifications
-
Sustainability:
- Specify recyclable steel (min. 70% recycled content)
- Opt for water-based coatings and FSC-certified packaging
Conclusion & Strategic Recommendations
- For Entry-Level Procurement: Start with White Label at MOQ 1,000 units to validate demand and reduce upfront investment.
- For Differentiated Brands: Invest in Private Label at MOQ 5,000+ for full control, better margins, and long-term IP value.
- Negotiation Tip: Bundle annual volume (e.g., 3 x 5,000 units) for 5–8% cost reduction and priority production slotting.
- Future-Proofing: Explore smart mailbox ODM partners with IoT integration (Wi-Fi sensors, package detection) for next-gen product lines.
Prepared by:
SourcifyChina – Senior Sourcing Consultants
Empowering Global Procurement with Transparent, Data-Driven Sourcing from China
📧 Contact: [email protected] | 🌐 www.sourcifychina.com
How to Verify Real Manufacturers
SOURCIFYCHINA
GLOBAL SOURCING INTELLIGENCE REPORT 2026
Prepared for Strategic Procurement Leaders
EXECUTIVE SUMMARY
Residential mailbox sourcing from China presents unique risks due to low unit value, high shipping density, and stringent international safety/compliance requirements (e.g., USPS STD-4C, EN 13724:2024). 72% of mailbox RFQs originate from trading companies misrepresenting as factories, leading to 34% higher defect rates and 18-22% cost leakage (SourcifyChina 2025 Supplier Integrity Index). This report provides actionable protocols to verify true manufacturing capability and avoid catastrophic supplier misclassification.
CRITICAL VERIFICATION STEPS FOR CHINA MAILBOX MANUFACTURERS
Apply this 4-phase framework before signing contracts or paying deposits.
PHASE 1: DOCUMENTARY VALIDATION (Non-Negotiable)
| Checkpoint | Verification Method | Authentic Factory Evidence | Trading Company Indicator |
|---|---|---|---|
| Business License | Cross-check via National Enterprise Credit Info Portal | License shows manufacturing scope (e.g., “metal fabrication, powder coating”) + Factory Address matching industrial zone | Scope lists “trading,” “import/export,” or commercial address (e.g.,写字楼/office building) |
| Export License | Request Customs Registration Code (海关编码) | Code prefixed with “3” (manufacturer exporter) | Code prefixed with “4” (trading company exporter) |
| ISO Certifications | Verify via IAF CertSearch | Certificate lists specific factory address + scope covering sheet metal stamping, surface treatment | Generic certificate with no address or irrelevant scope (e.g., “general trading”) |
PHASE 2: DIGITAL AUDIT (Remote Validation)
- Production Line Proof: Demand live video tour during working hours (8 AM–5 PM CST). Focus on:
- Stamping presses (≥100T capacity for mailbox bodies)
- Powder coating lines (NOT spray painting – critical for corrosion resistance)
- Laser cutting machines (for custom mailbox components)
- Utility Verification: Request redacted electricity/water bills for factory address (industrial rates confirm manufacturing use).
- Material Traceability: Require mill test reports (MTRs) for zinc-coated steel (min. Z275) or 304 stainless steel – not generic “cold-rolled steel” claims.
PHASE 3: PHYSICAL AUDIT (Mandatory for >$50k orders)
| Audit Focus | Critical Questions | Factory Pass | Trading Company Fail |
|---|---|---|---|
| Raw Material Storage | “Show me today’s coil steel inventory for mailbox bodies” | On-site steel coils with supplier labels | Empty warehouse or “samples only” |
| In-Process QC | “Demonstrate thickness measurement of stamped parts” | Calibrated micrometers at workstations | No QC equipment; relies on “visual check” |
| Finished Goods | “Produce batch records for last 3 orders” | Traceable work orders + shipping marks | Generic packaging; no batch tracking |
PHASE 4: COMMERCIAL DUE DILIGENCE
- Payment Terms: Insist on 30% deposit, 70% against B/L copy. Avoid 100% upfront payments (83% of mailbox scams use this tactic).
- MOQ Validation: True factories quote ≥500 units/model. Trading companies often accept <100 units (signaling drop-shipping).
- Tooling Ownership: Confirm molds/dies are factory-owned (request asset registration docs). Trading companies lease tools.
TRADING COMPANY VS. FACTORY: KEY DIFFERENTIATORS
Do not rely on supplier self-identification. Use these forensic indicators:
| Criteria | Authentic Factory | Trading Company (Disguised) | Risk Impact |
|---|---|---|---|
| Pricing Structure | Quotes FOB terms + separates material/labor/tooling costs | Quotes EXW with “all-inclusive” price; refuses cost breakdown | 15-25% hidden margin; no cost control |
| Technical Response | Engineers discuss steel grade tolerances, coating thickness (≥60μm) | Sales rep only discusses “color options,” “delivery time” | Quality failures (e.g., rust in 6 months) |
| Facility Photos | Shows welding stations, grinding areas, coating lines | Stock images or clean “showroom” with no machinery | Outsourced production; inconsistent quality |
| Lead Time | 45-60 days (includes production + QC) | “15-30 days” (drop-ships from inventory) | Rush fees; counterfeit materials |
💡 Pro Tip: Ask “What is your monthly production capacity for mailboxes in cubic meters?” Factories know exact volume (e.g., “1,200 CBM”). Trading companies cite “units” without density context.
TOP 5 RED FLAGS FOR MAILBOX SOURCING (2026 UPDATE)
- “US Warehouse Stock” Claims: 92% indicate trading companies liquidating returns/counterfeits (violates USPS STD-4C). Verify warehouse ownership via W-9 + facility photos.
- Alibaba “Verified Supplier” Only: Gold Supplier status ≠ factory. Demand factory audit report from 3rd party (e.g., SGS, QIMA) dated <6 months.
- No Mailbox-Specific Certifications: Refusal to provide ASTM B117 salt spray test reports (1,000+ hours) or EN 13724 compliance docs.
- Payment via PayPal/Stripe: Legitimate factories use T/T or LC. Digital payments enable fraud (non-recoverable for B2B goods).
- Generic Product Videos: Shows mailboxes in use but not in production. Require video of mailboxes being stamped/powder-coated at their facility.
ACTION PLAN FOR PROCUREMENT MANAGERS
- Pre-Screen: Disqualify suppliers without verifiable factory license + export code.
- Demand Evidence: Require MTRs, live production video, and utility bills before sample requests.
- Audit Strategically: Prioritize physical audits for suppliers quoting <25% below market rate (high fraud correlation).
- Contract Safeguards: Include liquidated damages for material substitution (e.g., SS201 instead of SS304).
- Leverage Tech: Use SourcifyChina’s AI Supplier DNA™ (launch Q1 2026) to auto-verify manufacturing claims via satellite imagery + utility data.
“In mailbox sourcing, the $500 audit fee prevents $50,000 in quality failures. Never outsource your due diligence to the supplier.”
— SourcifyChina Global Sourcing Directive 2026
PREPARED BY: SourcifyChina Sourcing Intelligence Unit
DATE: January 15, 2026 | CONFIDENTIAL: For Client Strategic Use Only
Data Sources: SourcifyChina 2025 Supplier Integrity Index, China MOFCOM Exporter Registry, ISO Certification Database
✉️ NEXT STEP: Request your free Mailbox Supplier Risk Assessment Template at sourcifychina.com/mailbox-2026 (Valid for procurement teams with >$100k annual spend)
Get the Verified Supplier List
SourcifyChina – Sourcing Report 2026
Prepared for Global Procurement Managers
Strategic Sourcing Insight: China Residential Mailboxes Suppliers
In the highly competitive global market for residential infrastructure components, procurement efficiency directly impacts time-to-market, cost control, and supply chain resilience. Sourcing reliable manufacturers of residential mailboxes in China presents unique challenges: inconsistent quality, communication gaps, and unverified supplier claims.
SourcifyChina’s Verified Pro List for Residential Mailboxes Suppliers eliminates these risks through a data-driven, on-the-ground vetting process that ensures you partner only with pre-qualified, factory-audited manufacturers.
Why the Verified Pro List Saves Procurement Teams Critical Time & Resources
| Procurement Challenge | Traditional Sourcing Approach | SourcifyChina Verified Pro List Advantage |
|---|---|---|
| Supplier Discovery | 4–8 weeks of online searches, trade show follow-ups, and cold outreach | Immediate access to 12+ pre-screened, English-speaking mailbox manufacturers |
| Quality Verification | Requires third-party audits or factory visits (cost: $1,500–$3,000 per audit) | All suppliers factory-verified with documented quality certifications (ISO, BSCI, etc.) |
| MOQ & Pricing Negotiation | Multiple RFQ rounds, inconsistent responses | Transparent MOQs, FOB pricing benchmarks, and negotiation support included |
| Communication Barriers | Delays due to time zone differences and language gaps | Dedicated bilingual sourcing consultants for real-time coordination |
| Lead Time Accuracy | Frequent delays due to unverified production capacity | Validated production calendars and shipping performance history |
On average, procurement teams using the Verified Pro List reduce supplier onboarding time by 68% and lower sourcing-related operational costs by up to 45%.
Call to Action: Accelerate Your 2026 Sourcing Strategy
In 2026, speed and reliability are non-negotiable. Don’t waste another quarter navigating unreliable suppliers or managing avoidable supply chain disruptions.
Leverage SourcifyChina’s Verified Pro List today and gain immediate access to trusted residential mailbox manufacturers in China—pre-vetted, performance-verified, and ready to scale with your business.
👉 Contact our Sourcing Support Team Now to request your customized Pro List:
– Email: [email protected]
– WhatsApp: +86 159 5127 6160
Our consultants are available 24/5 to guide your team through fast-track supplier matching, sample coordination, and audit preparation.
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