Classification of Supplier Management Systems：

Our company categories suppliers into five levels, as detailed below:

01st  Manufacture Franchise

02nd Ex-stock  Distributor

03rd OEM Excess Distributor 

04th Risky Suppliers 

05th Black List Supplier

Evaluation System：

Our company leverages its internal ERP system to conduct long - term, phased evaluations and monitoring of suppliers. We meticulously record every detail of the collaboration process and assign corresponding markers. When selecting a supplier, the system automatically displays its grade within our system and associated cooperation records. 

70% of our purchased products are sourced from Tier 1 and Tier 2 suppliers, 20% from Tier 3 suppliers, and 10% from Tier 4 suppliers, which are newly - onboarded partners. We do not engage in any cooperation with suppliers rated as Tier 5 by our system.

All product batches entering our company laboratory must strictly adhere to the following tiered inspection process: 

Class 1 Suppliers: 

Basic Inspection Items: Outer packaging integrity check Product label verification (including brand identification) Date code/batch confirmation Incoming quantity verification Direct warehousing upon passing inspection  

Class 2 & 3 Suppliers: 

1. Basic Visual Inspection 

2. Supplier Historical Performance 

3. Evaluation: Review of past quality records Analysis of historical non-conformance data 

4. Advanced Selective Testing: Decapsulation/internal structure analysis (if necessary) 

5. X-ray solder joint inspection (as required) 

6. Other targeted test items  

Class 4 Suppliers: 

1. Full Process Strict Inspection: Comprehensive visual inspection Mandatory decapsulation/internal structure analysis 

2. X-ray inspection 

3. Solder joint reliability testing 

4. Third-Party Authoritative Re-inspection: White Horse or GETS 

5. Supplementary professional testing Issuance of third-party test reports  

Note: All inspection results are recorded in the Quality Management System (QMS) to ensure full traceability. This protocol shall be periodically reviewed and updated to continuously optimize supplier management.