Wu Songsheng (born 1945) was one of the strongest players in the pre-professional area in China (together with Chen Zude). He was given a 9 dan rank as soon as China gave professional ranks (1982).
He migrated to Australia in 1985, and later transferred to the South Korean Go Association as a guest, until his final return to China in 1998.
http://gobase.org/information/players/?pp=Wu%20Songsheng