What is the process to start customized cooperation?

The core process is: 1. Demand communication: the customer puts forward customized requirements (gas type, function, appearance, quantity, etc.); 2. Scheme design: we issue a preliminary design scheme and quotation; 3. Scheme confirmation: both parties negotiate, optimize and confirm the scheme, and sign a cooperation contract; 4. Advance payment: the customer pays the advance payment; 5. Sample production and confirmation: we make samples and send them to the customer for confirmation; 6. Mass production: after the sample is confirmed to be qualified, start mass production; 7. Finished product testing and delivery: after the product passes the test, the customer pays the balance, and we arrange logistics delivery; 8. After-sales support: provide warranty and lifelong technical support.