to live a life in Hong Kong, S`PORE and domain city  like Shanghai...plus Taiwan as well , mastering Mandarin is an absolute key success to penetrates and asssociates with local interest and bussiness market....whilst the ability to understand both verbal /writting is a ticket for once to further culminating more on the Korean and Japanese diasphoras...coz overall, this oriental literatures has a same basic codes of writtings..