I did a little more checking for you. It looks like the MSM8260A version of the Snapdragon S4 SoC, the only used on the HTC Windows Phone 8X supports TD-SCDMA, so the international or U.S. version of the HTC Windows Phone 8X should be compatible with China Mobile's network, but you would only get 3G speeds, not LTE/4G.
So if you are on China Mobile, you want to go with either the localized Lumia 920T for China, or possibly an international or U.S. HTC 8x.
If you are on China Unicom, an international version of the Lumia 920 should work for you.