Complex sentence: Zhang entered Hangzhou Greentown youth club since he was 11 years old, due to his best performance, he joined China national under-17 football team in 2012, he scored two goals in three matches in 2012 AFC U- 16 Championship.
Split into simpler sentences: Zhang entered Hangzhou Greentown youth club since he was 11 years old. Due to his best performance, he joined China national under-17 football team in 2012, and scored two goals in three matches in 2012 AFC U- 16 Championship.