Mr Lam (right) chats with the Secretary for Commerce and Economic Development, Mr Gregory So (second left); the Permanent Secretary for Constitutional and Mainland Affairs, Mr Joshua Law (third left); the Director-General of Trade and Industry, Ms Maria Kwan (first left); the Director of the Hong Kong Economic and Trade Office in Chengdu, Mr Eddie Poon (second right) and the Director of Chongqing Liaison Unit, Miss Grace Li (third right), in the Chongqing Liaison Unit.   Close