"Help you for free. Huawei does not produce PCB, but there are suppliers in this field. If you want to sell consumables, you can call their buyers or tell you a good way. You can find a way to get in at Wadian Logistics Center. You can see that many PCB manufacturers deliver goods on the cargo platform. You can inquire about those suppliers and introduce several larger manufacturers. Shajing has Lianneng and Jinghua. Emerson is also good. " This is an insider who produces circuit boards. In fact, Huawei has many circuit factories to help production, which is more than many large PCB factories such as SYE and DMC Meiwei. See what you need. "