When you were 15 years old, you fought with others, hurt others, and even killed people. Can you be a lawyer when you grow up?

No, the law is very clear. People's Republic of China (PRC) Lawyers Law

Article 7 An applicant shall not be issued a lawyer's practice certificate under any of the following circumstances:

(1) He has no capacity for civil conduct or has limited capacity for civil conduct;

(2) Those who have been subjected to criminal punishment, except for negligent crimes;

(3) Being expelled from public office or having his lawyer's practice certificate revoked.