This has nothing to do with the seller. The key is in the customs, because you have plenty of mail, which is more valuable. So we need to go through customs. . . . Otherwise there will be tax evasion. . .

I've been in the same situation as you. .

Signed power of attorney for customs declaration. This is to be bought at the customs. "Payment invoice"-this can be made by yourself and used for export declaration. This is the packing list of your goods. Write down the quantity and weight of your things, as well as the original and copy of the contract. Just do it yourself. It should contain valuable signatures, senders and recipients' emails. . You can forge your signature yourself. . .

Actually the most important thing is the packing list. . . . It should be what you call the import and export payment submission form. ..

Again, it would be better if there were "how many pieces, how heavy" on the packing list.

Send it to your mail processing center. . . The phone is disconnected. Always busy. If the postal service receives more than 1000 yuan. Customs formalities should be done well. The tax rate exceeds 50 yuan RMB. Everyone has to go through this customs clearance procedure. . . . . The calculation method of tax rate is: the value of goods X0.2%