What does it mean for mail to go through customs formalities at Shanghai International Mail Exchange Bureau?

The reply is for reference only and I hope it can help you.

According to your detailed description, your goods have been confirmed by the customs for separate customs clearance and tax payment. And according to his short message, you have two options.

If you continue to wait for the goods to be normal at the post office for more than eight days, you will have to pay extra storage fees. It is better to prepare for customs clearance and pay taxes in time.

If I really can't find the customs clearance bank, then I will take the relevant documents to the window designated by the local post office according to the SMS requirements. If the customs duty is declared according to the individual, it is about 20%, subject to the requirements of the local tax payment window.

Deal with it quickly, you won't get the goods after waiting so long. Also, if the goods are inspected according to the general trade needs, it may not be handled, and it can only be handled according to the return.