Functions and processes of heavy metal testing institutions 
        
	1、The functions of heavy metal testing institutions are as follows:
	1. Supplier: Through accurate testing and analysis, control the quality of raw materials and select suitable suppliers.
	2. Manufacturer: Performance improvement, industrial diagnosis, cost control, reduced testing cycle, enhanced product competitiveness.
	3. Approval project: Provide detailed testing reports and successfully pass the approval.
	4. Performance evaluation: Ensure that the product meets relevant quality requirements, provide testing report support, and obtain market approval for the product.
	5. Industrial diagnosis: Analyze the causes of product failure, optimize product byproduct reactions, and perform foreign object detection and analysis.
	2、The testing process for heavy metal detection:
	1. Sending samples (communicating and exchanging with engineers, submitting testing items);
	2. Initial inspection (during the initial inspection period, develop a detailed experimental plan for the customer);
	3. Quotation (based on customer testing items and experimental complexity after initial inspection);
	4. Sign an agreement (sign a confidentiality agreement to strictly protect customer privacy);
	5. Start the experiment (usually takes 7-10 working days to complete, urgent for about 5 working days, except for individual experiments);
	6. End the heavy metal detection experiment and provide post service.