On the trade front, Saudi Arabia remains China's leading global supplier of crude oil and largest trading partner in the Gulf region, and China has become the largest trading partner of Saudi Arabia.

The trade volume between the countries has surged rapidly from $290 million in 1990 to $69.1 billion in 2014.

China's main exports to Saudi Arabia are clothing, mechanical and electronic products and textiles, while China mainly imports crude oil, liquefied petroleum gas and primary plastics from Saudi Arabia.

In the first half of 2015, crude oil exports from Saudi Arabia to China reached 26.3 million metric tons, a year-on-year increase of 9.2 percent, according to China's ambassador to Saudi Arabia, Li Wencheng.

Two-way collaboration in boosting the innovation of science and technology is also underway.

On Sept 11, 2015, a signing ceremony was held in Yinchuan in the Ningxia Hui autonomous region to co-build a technology-transfer center between the two countries.

Xinhua contributed to this story.

zhangyunbi@chinadaily.com.cn