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Africa's major obstacle to economic development is its obsolete infrastructure. The World Bank puts Africa's infrastructure gap at an estimated 93 billion U.S. dollars.

At the first session of the summit, leaders from the G20 members called for strengthened coordination on macroeconomic policy to tackle the sluggish economic growth.

Xi highlighted a timeline for achieving concrete results in the reform, saying breakthroughs in overhauling the leadership and joint command system must be made by 2020.

Rabbani said it is the cornerstone of Pakistan's foreign policy to develop friendly ties with China. He expressed hope that the two sides can jointly strengthen their ties.

On climate change, Brazil and China, both as developing countries, share similar historical circumstances and common interest, she said.