Complex sentence: His father, Fang Zhengwen (Mandarin Pinyin), taught him martial arts at a very young age, and when he was 16, he learned the Xiahong boxing style from Master Zhang in Shanghai finishing when he was 19.
Split into simpler sentences: His father, Fang Zhengwen (Mandarin Pinyin), taught him martial arts at a very young age. When he was 16, Charles learned the Xiahong boxing style from Master Zhang in Shanghai finishing when he was 19.