The Taiwanese players are hardly sponsored by the government. There are some incentives when they win world titles, but not much other than that. Why do you think Wu Chia Ching plays for China now?
Yup. Chang Jung Lin is probably overall more successful, including one world title (8ball) and multiple international titles with fields just as strong if not stronger than this one.
Chang is a great player. Good shotmaker, tactical and consistent. He just needs to figure out the break - that seems to be the weakness in most Taiwanese players.