What's the procedure for going to China-Kazakhstan Horgos International Border Cooperation Center?

Just use your passport. If you don't have a passport, you can apply for a temporary pass in the port hall. You can use it once in and out. There is also a kind of pass, which can be handled locally except for Xinjiang household registration. Xinjiang household registration takes one year. Let me tell you, if you come here, you will regret it, because everyone who has been here knows what I mean except a few shopping malls. I might as well take my wife and children to the park.