I think Leung Chu Yan was not invited directly from China to play in HK. He migrated to HK and played at the local championships and won the title. So the HK Team invited him; i think that was 1996. (not sure with the facts) HK did not really get any significantly good results from him until 2003.
Jiang Tianyi came to HK in 2005 i think? He was not even 18 then... 好似仲被人話係‘逃兵’因為他
Tang Peng.. HK was responsible for keeping him at this competitiveness... at age 33, he is now ranked at #19
I think you get the point... HK trained these "imports."