In July 1997 , Tsang was appointed Director - General of the Hong Kong Economic and Trade Office in London .
He was Assistant Director - General of Trade from 1992 to 1995 and Private Secretary to the Governor , Chris Patten , from March 1995 to June 1997 .
In July 1997 , Assistant Director - General was appointed Director - General of the Hong Kong Economic and Trade Office in London .
He was Assistant Director - General of Trade from 1992 to 1995 and Private Secretary to the Governor , Chris Patten , from March 1995 to June 1997 .