Investment in infrastructure and manufacturing will continue to be the key engine for the BRICS countries - Brazil, Russia, India, China and South Africa - to enhance regional connectivity and stimulate trade activities, business leaders said on Monday.

Concerning the asset amount, it may be a bit difficult for countries like India and South Africa to be very big investors. China, which accounts for two-thirds of the total economic aggregate among the five countries, should enlarge the investment scale to lay a solid basis for establishing the BRICS economic belt, Zhu Xian, vice-president of the BRICS New Development Bank, said at the International Investment Forum 2017 in Xiamen.

The forum is a major event of the China International Fair for Investment and Trade in Xiamen, Fujian province, held from Sept 18 to 21.