Joseph Yam , the monetary authority 's chief executive , said that he did not know whether China would let the yuan rise someday , but added that Wednesday 's change was intended to '' reduce the usage of the Hong Kong dollar as a vehicle for speculation on a revaluation . ''
Hong Kong
China
/location/administrative_division/country
China
Hong Kong
/location/location/contains
China
Hong Kong
/location/country/administrative_divisions
PERSON
Joseph Yam
LOCATION
China
LOCATION
Hong Kong