Tung Chee-hwa (Front), vice-chairman of the National Committee of the Chinese People's Political Consultative Conference, visits a photo exhibition marking the 30th anniversary of the establishment of the China-US diplomatic relations in Hong Kong, south China, July 20, 2009. Nearly 300 photos were displayed in the exhibition, opened on July 20. [Photo/ Xinhua]

He said that the exhibition will provide an opportunity for people to know further about the importance of Sino-US relations so that they will make greater efforts to promote the relations.

Also speaking at the ceremony, US Consul General in Hong Kong and Macao Joseph R. Donovan said that US-China relations had been marked by success and challenges.

"Despite the scale of the task we have faced, each succeeding generation of leaders, diplomats, and individuals has broadened and strengthened the US-China relations," he said, noting that the exhibition offers "snapshots" of their dedication and efforts.