The Chinese real estate tycoon Xu Jiayin, also known as Hui Ka Yan in Hong Kong, is the second biggest billionaire "gainer" in 2017, with a net worth growth of $27.4 billion according to Forbes's latest list, Sina News reported.

Forbes tracked the net worth growth of more than 2,000 billionaires between Jan 1 and Dec 14 this year. The top 10 billionaires added $204 billion to their fortunes in total.

Amazon CEO Jeff Bezos, currently the richest person in the world, topped the list, gaining $33.8 billion thanks to soaring Amazon stock.

Pony Ma, chairman of Tencent Holdings, took fifth place. Yang Huiyan of Country Garden Holdings, the richest woman in China, was ranked eighth.

Hu Xinyi contributed to the story.