Permits in China can be intimidating. They require use of AFTN/SITA, have specific routing, and are only valid for the exact timing given. Commercial landings require a sponsor letter written in Mandarin by the receiving party.
We recommend applying with AMERICAN FLIGHT SUPPORT, as the authorities aren’t very patient and it can become frustrating at how short they’ll be on the phone. If you want to apply direct, you’ll send your application through AFTN and SITA, in the specific format required. Working with AMERICAN FLIGHT SUPPORT allows all to be in order, making it easier to get approval.