All bookings are currently managed through the WeChat account "SITHC-SHHG". However, for foreign students who are new to Shanghai and do not yet have access to WeChat, an external mailbox has been set up to assist you. 

You can write to the customs office at shbjzx@customs.gov.cn. If you encounter any difficulties or have any questions, please feel free to call the service hotline at 021-62688851.

Source: Shanghai Customs