Classroom to billion-dollar fortune: How Chinese siblings struck gold in the stock market

How Chinese siblings struck gold in the stock market A stock market debut has delivered a billion-dollar glow-up for a former elementary school teacher and his sister in China, turning them into billionaires after shares of their adhesive products company skyrocketed nearly eightfold on their first day of trading.Michael Mai, 62, who once taught at an elementary school in the southern Chinese city of Zhongshan, now has an estimated fortune of $2.5 billion following the listing of Crown New Materials Technology on the Shenzhen Stock Exchange on Tuesday.His sister, Mai Huixia, 64, who serves as the company's vice-chairperson, has also made it to the billionaire club, with an estimated net worth of $2 billion.The company, which Mai chairs and leads as CEO, made its stock market debut at 16.98 yuan per share. Its shares subsequently jumped as much as 787%, according to the Shenzhen bourse, mainland China's second-largest stock exchange. The estimated fortunes of the siblings are based on their respective stakes in the business, Forbes reported.Mai is an Australian citizen and permanent resident of Hong Kong. Crown New Materials Technology, founded in 2000, is headquartered in Zhongshan...