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Criticism and self-criticism should be carried out among Party members in order to maintain the Party's advanced nature and purity, Liu said.

"Unapproved tree felling, land reclamation, farming, digging and the use of water resources in the forested areas must be strictly cracked down on," said the statement.

While China has been striving for more sustainable economy, its great need of clean technology plays a "very crucial role" in the world growth.

Cameron arrived in Beijing earlier Monday for a three-day official visit to China at the invitation of Chinese Premier Li Keqiang.

China supports the Arab countries to safeguard their legitimate rights. "The Arab countries are important and equal members of the international community. China opposes harming the Arab countries' national dignity in excuse of anti-terrorism and human rights, and is willing to strengthen collaboration and cooperation to better safeguard the interests of both China and the Arabic nations, as well as other developing countries," Wang said.