Asia's once-richest woman lost 84% of her wealth — more than any billionaire since the COVID-19 pandemic — as China's property sector teeters on yet another crisis.Wealth-X; Country Garden Danga Bay/Facebook; Shayanne Gal/Business Insider Yang Huiyan, the chair of Chinese property giant Country Garden, lost about $29 billion of her wealth since June 2021. According to Bloomberg, she lost $490 million on Tuesday alone as her company missed interest payments. Country Garden's sales plummeted by 30% year-on-year in the first six months of 2023. Yang Huiyan — once Asia's wealthiest woman — has lost more of her wealth than any billionaire since June 2021, as China's top property developer Country Garden grapples with a debt crisis.Since its peak in June 2021, chairperson Yang's net worth has plummeted by 84%, or $28.6 billion, Bloomberg reported.