Why Can We Always Ensure Excellent Quality

Quality Control

The company's product matrix covers the agency of top international brand products and its own optical modules and other core components. Its quality control system closely aligns with the business model of 'distribution-focused, self-developed as a supplement,' following the core logic of 'source selection - process control - scenario adaptation - after-sales closed loop,' ensuring the provision of highly reliable products for key industries such as government, finance, and telecommunications.

Source Quality Control: Supplier Selection and In-House Foundation Management

Hengzheng Tongchuang's quality defense starts at the source of the product, fundamentally avoiding quality risks through strict access standards and design specifications.

Agent Products: Access and Review of World-Class Suppliers

Relying on the development strategy of 'integrating globally leading products,' Hengzhengtong Chuang has also established a multi-level supplier selection system.

1. Core Partner Admission: Give priority to internationally recognized brands with high market validation to establish a foundation for product reliability.

2. Dual Qualification Verification: Require suppliers to provide complete third-party test reports (such as GR-468-CORE compliance reports for optical modules), industry certifications (such as UL certification, green building material certification), and production system certifications (such as ISO9001), with a focus on verifying key indicators such as product weather resistance and compatibility.

3. Dynamic Performance Evaluation: Evaluate suppliers quarterly based on data such as product failure rates and after-sales response times. If a brand fails to meet the standard for two consecutive evaluations, initiate a process to assess alternative suppliers to ensure supply chain quality stability.

Proprietary Optical Modules: Source Control at the Design Stage

For its proprietary optical module products, Hengzhengtongchuang continues the industry-wide full-lifecycle quality control logic and strengthens risk mitigation during the design phase:

1. Component selection benchmarking: Core components are all procured from top-tier brands such as Finisar and Huawei. Optical chips must pass -40℃ to 85℃ temperature cycle tests, ensuring threshold current fluctuation ≤5%; connector plug-in/pull-out durability is tested to ≥1500 cycles, with insertion loss controlled to ≤0.3dB, exceeding conventional industry standards.

2. Scenario-based structural design: For high-load scenarios in industries such as finance and telecommunications, a high thermal conductivity aluminum alloy casing and PCB partition heat dissipation design are adopted. Thermal simulations ensure that the module temperature does not exceed 70℃ under full load, providing 15% more heat dissipation redundancy than industrial-grade standards.

Warehouse Entry Control: Full-process Inspection and Traceability

Implementation of the three-level inspection process

Referring to the “Self-Inspection, First-Article Inspection, and In-Process Inspection” standards in the GJB9001C-2017 system, a dedicated inspection process is established:

1. Initial Inspection upon Arrival: Verify that the product model and batch match the order, check the integrity of the packaging, perform a full visual inspection of precision components such as optical modules, and remove any items with visible defects such as pin oxidation or casing damage.

2. Performance Re-Inspection: Use devices such as optical power meters and bit error rate testers to conduct a full performance check of optical modules, focusing on verifying indicators such as transmit optical power (e.g., 10Gb SFP modules controlled within -3dBm to 0dBm) and receive sensitivity (≤ -12dBm), ensuring compliance with industry standards.

3. Compatibility Sampling Inspection: Randomly select 5% of products from each batch for interoperability testing with commonly used equipment such as Bokoe switches, verifying signal transmission stability and preventing link interruptions caused by compatibility issues.

(2) Full-process traceable management

Establish a unique identification code for each product entering the warehouse, linking supplier information, inspection data, storage time, and 12 other pieces of metadata to form an electronic traceability record. This record can interface with downstream customers' asset management systems, facilitating compliance audits and fault tracing for clients in industries such as government and electricity.

After-Sales Closed Loop: Data-Driven Quality Optimization

Relying on the service philosophy of 'focus and professionalism,' Hengzhengtong has established a system for after-sales quality tracking and continuous improvement:

1. Rapid Response Mechanism: For key industry clients such as finance and telecommunications, we commit to remote response within 2 hours and on-site handling within 48 hours. Faulty products are subject to a 'replace first, repair later' policy to minimize business interruption losses.

2. Data-Driven Improvement: Monthly quality analysis meetings are held to correlate after-sales fault data with supplier ratings and testing standards, forming optimization plans. For example, in response to a batch of HBA cards with poor contact issues, suppliers are prompted to upgrade the pin gold-plating process, and throughput testing is added after 100 insertion/extraction cycles during incoming inspection.