BEIJING, Sept. 12 (Xinhua) -- A United Nations (UN) official expressed appreciation for China's efforts in enhancing the South-South cooperation Thursday in Beijing, where the UN Day for South-South cooperation was commemorated.

"China is a key player of South-South cooperation," UN Resident Coordinator in China Nicholas Rosellini said during his opening remarks for the event.

"China, as one of the most successful developing countries over the last 40 years in terms of its own achievements, poverty reduction, economic development and human development, has a lot to share with other countries," Rosellini said.

He said that China has experience in scaling up projects, and the country's development experience is new and therefore more relevant to other countries.

Considering the poverty reduction and challenges on climate change as main concerns of South-South cooperation in the future, Rosellini said that China's achievements, such as the gradual shift to its low-carbon economy and big investment in renewable energy, make it a country that "has something to say on both issues."

The day also marked the launching of a technology transferring South-South cooperation center for renewable energy technology exchange between China, Ghana and Zambia.