Isn’t it possible to apply for file establishment and card establishment in Xinjiang after 2018?

No.

There is no relevant policy stating that all registered households will be canceled in 2018. If you meet the application conditions for registered households, you can still apply.

Creating a file means creating a file. The term "establishing a file and setting up a card" is a relatively new term for many friends. It is the preliminary preparation work carried out by the Provincial Poverty Alleviation Office for targeted poverty alleviation, mainly to find out the situation of the poor.