Japan must be responsible for the consequences should any friction take place due to its disturbance of China's normal law enforcement activities around the Diaoyu Islands, a Chinese official said Saturday.

"Japan must take all consequences should any friction (with China) take place because Japan insists it wrong deeds on the Diaoyu Islands issue, even using vessels and planes of Japan's Self-Defense Forces to disturb normal law enforcement by China's vessels and planes," Lyu Xinhua said.

Lyu Xinhua, spokesman of the first session of the 12th Chinese People's Political Consultative Conference (CPPCC) National Committee, speaks during a news conference on the CPPCC session in Beijing, capital of China, March 2, 2013. [Photo/Xinhua]

Lyu, spokesman for the annual session of the National Committee of the Chinese People's Political Consultative Conference, said China, as a peace-loving country, will not cause any troubles, "nor will it be afraid of any trouble-makers."

"China is willing to get along peacefully with all countries including Japan, but we have our principles and baselines," Lyu said at a press conference in Beijing.

He said China has not changed its stance to develop Sino-Japan relationship under the principles of the four political documents signed by the two countries.

However, "we will never recede on issues related with China's territorial sovereignty," he said.

He urged the Japanese leaders to stop making irresponsible remarks and make substantial efforts in improving the relations between the two countries.

"Under current circumstances, what is important is that Japan must stop any activities that do harm to China's sovereignty over territory," Lyu said.

Lyu said the Diaoyu Islands are China's inherent territory and the Japanese side has no rights to "trade" China's territory in whichever way.

"No grass, no trees, no rocks or soil on the Diaoyu Islands should be traded. The 'purchasing of the islands,' in whichever way, will severely infringe on the Chinese territorial sovereignty," Lyu said.

He said China has the confidence and capability to maintain the country's territorial sovereignty and maritime rights.