Shanghai Yisong Intelligent Technology Co., Ltd.

About quality control, we have good production, test and packing system:

1 Production system
--- All spare parts for products are strictly complianced with international standards standards.

2 Perfect Test system
--- Before sending to clients, finished products will be tested strictly three times by experienced engineers.

3 Packing system
--- Products are packed well.

These all entrue that our clients can receive products without accident.