True knowledge comes from practice, and real professional ability comes from practice. First of all, learn from old comrades with an open mind, eat hard, learn from the masses with an open mind, and learn to do mass work, regardless of personal gains and losses. Everyone has a selfish side, but we must never be selfish. We should be good at integrating theory with practice, constantly sum up experiences and lessons in our work and accumulate knowledge. Public security business includes legal knowledge and public security professional knowledge. There is nothing wrong with not being strict with yourself, but being a good policeman is not easy. You can ask such questions here. I believe you will be a good policeman in the future.