Chinese President Xi Jinping (5th R) meets with foreign participants in the second Understanding China Conference in Beijing, capital of China, Nov. 3, 2015.  [Photo/Xinhua]

The G20 system is expected to be perfected and its role as a major platform for international economic cooperation will be cemented to make global economic governance more fair, inclusive and efficient, Xi said.

All parties are expected to understand and respect each other, properly tackle differences "and send positive signals to the outside world about the consolidation and coordination of the G20", Xi said.

Wu Jianmin, executive vice-chairman of the China Institute for Innovation and Development Strategy and a former Chinese ambassador to France, said the G20 summit next year is "problem-oriented".

Wu said the global economy has slowed and the biggest issue is sluggish demand.

China's Belt and Road Initiative and the Asian Infrastructure Investment Bank are targeting this lack of demand, Wu said, adding, "As the world gets better, China gets better, and vice versa."

Support for Liberia

In a meeting with visiting Liberian President Ellen Johnson Sirleaf, Xi said China looks forward to deepening cooperation with Liberia in key areas such as infrastructure, marine transportation, agriculture, fisheries, production capacity and manufacturing.

China will also help to improve public health and epidemic prevention systems in Liberia and increase government scholarships for the African nation.

It will also continue to take part in UN peacekeeping efforts in Liberia, Xi said.

Johnson Sirleaf, the 2011 Nobel Peace Prize laureate, thanked China for being the first country to help fight the Ebola epidemic in West Africa, saying it is a trustworthy friend.

Wang Xu contributed to this story.