Think tank experts from more than 20 countries are in Beijing discussing problems and solutions on current global economic growth.

The Global Governance and Open Economy: 2015 G20 Think Tank Summit started in Beijing on Thursday.

The event, which will last until Saturday, was hosted by the Chongyang Institute for Financial Studies, Renmin University of China, and co-organized with several other leading think tanks in China.

"G20's development is an objective reflection of the international economic structure," said Zhang Jun, director general of the International Economic Affairs Department, Ministry of Foreign Affairs of the People's Republic of China, at the opening ceremony. "China is an active builder of the G20 system and is also a beneficiary."

The Chinese government has already started its preparations for the G20 Summit in 2016 and is now designing the themes and topics, Zhang said. He added that the summit next year will be dedicated to putting forward some open policy ideas and proposals to lead the world's economic development.

Jose Luis Rodriguez Zapatero, former prime minister of Spain, says that Chinese think tanks have been very active in recent years and have great influence over the Belt and Road Initiative and the G20 area, which also shows that China is now more and more influencial in the global development process.

An G20 Think Tank annual report was also released on Thursday, which says that the primary issues facing G20 now are leading the global economy out of the low-growth situation that has been consistent for years after the global recession and achieving strong and sustainable growth.

At present, there are many new opportunities booming, which has brought hope to the development of the global economy. China needs to work with other G20 members and make concrete collaboration, including putting forward some quantitative targets for the next five years, and a middle and long-term vision for development, the report says.