The survey is divided into five modules. If it's just a single module, buy a module collection of that module and do the real questions in recent years well. Tibetan civil servants should not be too difficult. Look at the real problem of western provinces. The most important thing is the real question. Never put the plow before the oxen.
Training institutions, you can go to their websites to see, according to your own situation, choose the review method that suits you, and you will get the best results.