The specific promotion is divided into three aspects. The promotion of police rank, the undergraduate course is awarded to the third-class superintendent, promoted to the first-class superintendent three years later, and promoted to the first-class superintendent four years later. If you don't hold the leadership position above, you won't be promoted.
Level: according to the administrative level of civil servants, clerk, deputy, principal, deputy, etc. If there is no post, you can hold a non-leadership position, such as a chief clerk. Some places need exams to get promoted. Generally, those who are not employed will have the opportunity to be promoted after six years of service.
Position: Selected Graduates system, some places will open enrollment. Corrections (clerks) start at the grass-roots level, with deputy wardens, wardens (above the share level), deputy wardens (deputy wardens) and wardens (section chiefs) at the department level, deputy wardens at the deputy department level and wardens at the middle level.
This is what the leader asked you to do. After you go up, your level will be adjusted accordingly. After three years in office, you can (in some places, you need an exam) be promoted to a non-leadership position at the next higher level. Those who have served as the district head (captain) of the sub-prison for three years can be promoted to deputy chief clerk, and those who have served as deputy chief clerk for three years can be promoted to chief clerk.
The vast majority of people, to the official position, the first-class police inspector to the top.
As for the danger, some people are punished because of inadequate management and enforcement of laws and regulations, which leads to prisoners escaping or other major accidents (serious criminal responsibility), and some people are punished or criminally punished for handling various cases (accepting bribes) in violation of regulations.
There are also prisoners who violently imprison or hold prison guards hostage (this is rare in women's prisons)
Generally speaking, there is almost no danger if the rules and regulations are strictly observed.