This year, a public institution in Hotan recruited management positions of the special patrol brigade. I signed up and told my wife about it, but she didn't agree.

Actually, I also support your wife's choice. First of all, the social order in Xinjiang is very unstable. Even if you take a fancy to a stable job in this profession, your personal safety there can't be guaranteed. Secondly, you are a remarried family, and your wife married you with her children. Your marriage foundation itself is not solid. If you separate again, it is likely to lead to another breakup. Finally, if you are not satisfied with your present job, you can try your best to get a teacher qualification certificate, and then get a teacher who is officially editing, so that your future work and life will be stable and you don't have to live apart in order to earn money.