BEIJING, Dec. 28 -- China voiced strong dissatisfaction at the arrival of Filipino demonstrators on China's Zhongye Dao Island in the South China Sea on Monday.

"China has indisputable sovereignty over the Nansha Islands, including the Zhongye Dao Island," said Chinese Foreign Ministry spokesman Lu Kang in response to a question on the Filipino demonstrators, who landed on the island over the weekend.

Lu said China urges the Philippines to withdraw its personnel and facilities from the illegally-occupied Chinese island, and never do anything that harms regional peace and stability as well as China-Philippines relations.