PHNOM PENH -?Cambodian Prime Minister Hun Sen on Thursday left here for Shanghai, China to attend the opening ceremony of the World Expo 2010.

Sriev Tham Ronn, senior adviser to Prime Minister Hun Sen said at the airport that Cambodia and China enjoy a long history of friendship and such friendly relations have developed rapidly and enhanced steadily in recent years. "The Shanghai World Expo 2010 is the largest one in its history, so we are happy to have the chance to participate in it. We believe that we can learn more from it and let more people know Cambodia," he added.

The delegation included Deputy Prime Minister and Minister of Foreign Affairs and International Cooperation Hor Namhong, Senior Minister and Minister of Commerce Cham Prasidh and other members of the Royal Government of Cambodia.

During his visit, Hun Sen will hold official talks with Chinese President Hu Jintao on Saturday.

Deputy Prime Minister and Minister of Interior Sar Kheng, Chinese Ambassador to Cambodia Pan Guangxue and other government officials saw Hun Sen and his delegation off at the Phnom Penh International Airport.