I was mainly checking to see whether routine USPS service was offered. My experience in shipping things overseas (El Salvador most recently) is that USPS can be an order of magnitude less expensive than a private shipper (like UPS), plus you avoid brokerage fees paid at the other end. For example, I shipped a fairly hefty box to El Salvador for $240 or so USPS; UPS wanted north of $1,000 for that box. Plus brokerage.
Understand you want direct experience with China—sorry, can’t help on that.