To survive at Alibaba Group Holding Ltd. you need to work 12 hours a day, six days a week. That’s what billionaire Jack Ma demands of his staff at China’s biggest e-commerce platform.

Ma told an internal meeting that Alibaba doesn’t need people who look forward to a typical eight-hour office lifestyle, according to a post on Alibaba’s official Weibo account. Instead, he endorsed the industry’s notorious 996 work culture — that is, 9 a.m. to 9 p.m., six days a week.

“To be able to work 996 is a huge bliss,” China’s richest man said. “If you want to join Alibaba, you need to be prepared to work 12 hours a day, otherwise why even bother joining.”

China’s tech industry is littered with tales of programmers and startup founders…