China lodged solemn representation Wednesday on Japan's seabed exploration for natural resources in disputed waters of East China Sea.

Japan launched the exploration Wednesday in the disputed waters to the east of so-called "medium line" which was unilaterally proposed by the Japanese side. Chinese Vice Foreign Minister Wang Yi summoned Japanese ambassador to China Koreshige Anami and lodged solemn representations over the issue.

Wang Yi said the East China Sea has not yet demarcated, and there is still controversy on the issue. China has never recognized and will unlikely accept the so-called "medium line", which is unilaterally proposed by the Japanese side.

China cannot tolerate Japan's move imposed upon others and firmly opposes the dangerous provocative act, Wang said.

The demarcation of the East China Sea can only be solved through negotiations, which is the only correct choice, said Wang, adding that China urges the Japanese side to abide by international laws and immediately stop the act that infringed upon China's interests and sovereignty in the disputed sea area.

(Xinhua News Agency July 8, 2004)