Hello,

Since there is limitation of post email address in wordpress.org forum, I would like to continue the topic at: https://wordpress.org/support/topic/how-to-make-it-support-china/

and I am very pleased to pay for your pro plugin if you make it support china domestic market.

In China, the carriers provide the similar Service Providers tools to import & export, and generate shipping labels and Shipping NO.

Here is full list of shipping carriers in China.
https://www.kuaidi100.com/all/

Here are apis of four shipping carriers:
http://zop.zto.com/apiDoc/
http://open.sto.cn/Document/Pra
http://open.yto.net.cn/OpenPlatform/doc
https://open.sf-express.com/document/apinorm.html
PS: the last one of Sf-experess is the most competitive carrier, but their shipping price is more expensive, and they ask register an account by email to show detailed API documentation.

and let me know if you need more shipping carriers API, and I am very glad to help on this work.

Have a nice day.

Alex