Chinese math teacher becomes a billionaire by tutoring
A Chinese math teacher named Liu Yachao, COO of TAL Education Group, has become a billionaire after the company's stocks more than doubled in the past year. The 36-year-old, who owns a 4.75% stake worth $1 billion, was the first math teacher to join the Beijing-based tutoring service. TALâs other founder, Zhang Bangxin, has a net worth of $6.6 billion.