Yang Huiyan, daughter of property tycoon, among world's richest under 40

A woman Chinese billionaire has been named the world's sixth wealthiest person under the age of 40.

Yang Huiyan, the 33-year-old vice-chairwoman and largest shareholder of property developer Country Garden Holdings, made the list with a net worth totalling US$5.1 billion, according to a survey by Singapore-based consultancy Wealth-X. She was the richest woman in Asia, the report said.

The list is topped by Facebook co-founder and chief Mark Zuckerberg, who has an estimated net worth of US$35.1 billion. Seven out of the top 10 are self-made billionaires, and most of the figures work in technology.

Country Garden is the mainland's No6 property developer in terms of sales and has a market capitalisation of US$61.87 billion.

Yang became the mainland's richest person at age 25 when her father Yang Guoqiang transferred 70 per cent of his holdings to her in 2007 just before taking his firm public in Hong Kong.