1. Basic conditions:
1）. With the ISO9001 system certificate, and have one year's experience at least in the production and sales of similar products;
2）. Not in the list of companies with serious violations of law and dishonesty;
3）. Not in the list of prohibited enterprises by other countries.

2. The main categories of tongyu suppliers are:
Connectors, cables, PCBs, electronic materials, radomes, electroplating, plastic parts, pultruded profiles, die-casting, packaging materials, motors, and hardware, etc..