At present, the recruitment of public institutions adheres to a principle, that is, if you enter, you must take the exam. There is no such thing as going through the back door or spending hundreds of thousands of dollars to prepare. But China is so big, it is normal to have exceptions, and some small places can still do some black-box operations. To explain in advance, the provincial joint entrance examination or the provincial and municipal unified examination is relatively fair. It is impossible for a unit to know the written test, and it is impossible for the Municipal People's Social Security Bureau to know the topic, because the topic is entrusted to a third party and will be unpacked by the invigilator a few minutes before the test.
Interviews are mostly structured interviews, and the location, personnel and examiners are arranged by the whole city and decided by lottery. It is possible that I learned that I was an examiner the day before the interview, and my composition was random. When it comes to the interview, examiners and candidates are randomly assigned. It is very difficult to operate behind closed doors, and the fairness is similar to that of public examinations. You can rest assured that you can apply for such positions.