This is a screenshot from the device that I have:
I was doing research which Chinese operator is compatible with my device.
- iPhone X - Technical Specifications - https://support.apple.com/kb/SP770
- iPhone models supported by China Mobile, China Unicom, and China Telecom's LTE, 3G, and 2G networks - https://support.apple.com/en-gb/HT202909
- What are all the differences between the iPhone X? How many different versions are there? https://everymac.com/systems/apple/iphone/iphone-faq/differences-between-iphone-x-a1865-a1901-a1902-models.html
From the links above I am reaching the conclusion that my device is totally useless.
More research, search engine "A1901 China"
With Model A1901, LTE should work, but CDMA will not.