Conversation so far:
What year did Bruce Lee leave Hong Kong?
Lee's father decided his son should leave Hong Kong to pursue a safer and healthier life in the United States.
Was he young when he left?
In April 1959, Lee's parents decided to send him to the United States to stay with his older sister.
How did he feel about leaving?
CANNOTANSWER.
What did he do after he left?
CANNOTANSWER.
What else did you find interesting in this section?
Lee's street fights became more frequent and included beating the son of a feared triad family.

Question: Why did he fight?
Self-contained rewrite: Why did Bruce Lee fight?