The number of billionaires in China has overtaken that of the US for the first time, an annual survey said Thursday, despite slowing growth in the world's second-largest economy.

China now has 596 billionaires, up a "staggering" 242 over the last year, Shanghai-based luxury magazine publisher Hurun Report said, surpassing the 537 Americans.

"Despite the slowdown in the economy, China's richest have defied gravity, recording their best year ever," Hurun Report Chairman Rupert Hoogewerf said in a statement.

Real estate and entertainment magnate Wang Jianlin dethroned founder of e-commerce giant Alibaba Group Holdings' Jack Ma Yun as the country's richest person, Hurun's annual wealth ranking showed.

Wang, who founded conglomerate Wanda, saw his fortune jump more than 50 percent to $34.4 billion, helped by a surge in the stock price of a listed unit.

Wang is known outside China for a string of overseas acquisitions including the organizer of Ironman extreme endurance contests, Swiss sports marketing group Infront, and a stake in Spanish football club Atletico Madrid.

Wang took the top spot back from Ma, executive chairman of Alibaba, because of a collapse in the Internet company's New York-quoted shares, which were the world's biggest IPO at $25 billion in September 2014.

Ma's wealth still stands at $22.7 billion. And Beverage tycoon Zong Qinghou of Wahaha remained in third place with just over $21 billion.

Pony Ma Huateng, founder of Internet giant Tencent Holdings which operates popular messaging app WeChat, took fourth place with a little under $19 billion.

Lei Jun of smartphone maker Xiaomi Inc, which is seeking to challenge Apple Inc, jumped five places to fifth by doubling his wealth to more $14 billion.

Yan Hao of road builder China Pacific Construction was sixth while the CEO of search engine giant Baidu Inc, Robin Li Yanhong, dropped to seventh amid worries over his company's huge spending to expand its business.