RIO DE JANEIRO - The outcome document adopted at the UN Conference on Sustainable Development (Rio+20 summit) is comprehensive and balanced, reflecting major concerns of all parties, a Chinese official said here Friday.

"The final document adopted by the summit reflects the spirit of cooperation of the international community and future prospects for sustainable development," said Du Ying, chairman of Chinese Preparatory Committee for Rio+20 Earth Summit, which ended here Friday.

"It is of great significance in guiding the direction of global sustainable development," Du said in an interview with Chinese media.

The document reiterated the principle of "common but differentiated responsibilities," maintained the foundation and framework of international development cooperation, and provided important guidance for the 2015 international development agenda, said Du.

Sustainable Development Goals will replace the United Nations' Millennium Development Goals from 2015.

The document emphasizes that green economy is an important way of achieving sustainable development, but it should be applied according to each country's national conditions and stage of development.

The summit decided to establish a high-level political forum to replace the Rio+20 Earth Summit and to strengthen the functions of the United Nations Environment Program, helping to enhance the status and importance of sustainable development mechanism within the UN system, Du said.

He also said the Chinese delegation led by Premier Wen Jiabao made important contributions to the promotion of global sustainable development.

Premier Wen expressed the willingness of China to push forward, along with the international community, the cause of sustainable development, Du said.

During the negotiation process, which had lasted for a year and a half, China has been positive and constructive in discussions and consultations on the final document, he said.

"The Chinese delegation made important contributions to urge all parties to seek common ground while reserving differences, to bridge their differences and push forward the negotiations for a consensus," Du said.

Around 50,000 people, including heads of state and government, had meetings here for the past three days to discuss new measures for poverty eradication, social equity advancement and environment protection.