Can Lhasa police be in charge of the whole province in less than five years?

Of course. According to the "Regulations on the Transfer of Police Work in Lhasa", the police transfer right belongs to the public security organs, and the police in Lhasa can be transferred during the five-year service period. The specific transfer situation will be determined according to the needs of public security organs and personnel management. After graduating from the police academy, you can choose your own area, take the national public security entrance examination and return to your hometown.