Teen drug use hasn’t rebounded from its drop during the early years of the COVID-19 pandemic.

HANGZHOU, China - Jack Ma, the billionaire who ushered e-commerce into China, is officially stepping down as Alibaba's executive chairman on Tuesday. After two decades building Alibaba into a $460 billion business, Ma is now pivoting full time to philanthropy. "Jack has been signaling for some time his interests in philanthropy, environment, women's empowerment, education and development," said Duncan Clark, the author of "Alibaba: The House That Jack Ma Built." The eager teacher"Before I'm 70 years old, I can do something in other fields, in areas like education," Ma said at an Alibaba event last September. A Communist Party member, Ma is China's most famous entrepreneur and with a fortune of nearly $40 billion the country's richest man.