President Hu Jintao ended his three-day Hong Kong visit Sunday after attending the celebrations for the 15th anniversary of Hong Kong's return to China, and the swearing-in ceremony of the fourth-term chief executive Leung Chun-ying of the Hong Kong Special Administrative Region and his new government.

On Sunday morning, Hu was present at the inauguration ceremony at the Hong Kong Convention and Exhibition Center, overseeing Leung to take his oath solemnly.

Principal officials of the fourth-term HKSAR government and members of the Executive Council also took their oaths.

Speaking at the ceremony, Hu said the central government will remain committed to the principles of "one country, two systems," "Hong Kong people administering Hong Kong" and a high degree of autonomy.

The central government will unswervingly give its full support to the chief executive and government of the HKSAR in administering Hong Kong pursuant to law, while working with the local residents to maintain and promote the long-term prosperity and stability of the territory, Hu said.

Before his departure, the president met with Leung and new leaders of the executive, legislative and judicial bodies of HKSAR separately.