Which country's model is this charging cable?

That's a 2 meter USB C cable.

Cables are not country specific.

Yes, the Apple USB-C Charge Cable (2m) with model number MLL82FE/A is available for purchase in mainland China. You can find it through various online retailers and authorized Apple resellers, such as Sundan. Additionally, you can check Apple's official website for China or visit local Apple Stores to purchase this cable.