PHNOM PENH - Cambodian King Norodom Sihamoni left?Phnom Penh?on Monday for China to attend the celebration of China's National Pavilion Day at Shanghai World Expo 2010 at the invitation of China.

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China's National Pavilion Day at Shanghai World Expo will be celebrated on Oct 1, the Chinese National Day.

Meanwhile, King Sihamoni will also visit other countries' national pavilions during his stay in China, including his country's ?pavilion, according to the officials of Chinese embassy in Cambodia.

Seeing the King off at the Phnom Penh International Airport were Cambodian Senate President Chea Sim, National Assembly President Heng Samrim, Prime Minister Hun Sen and Chinese Ambassador to Cambodia Pan Guangxue, as well as other members of Royal family.