Jack Ma or Ma Yun, Chairman of Alibaba Group, performs as a rock star during a celebration for the 20th anniversary of Alibaba in Hangzhou city, east China's Zhejiang province, 10 September 2019. A tearful Jack Ma formally left Alibaba on Tuesday, donning a guitar and a rock star wig at an event for thousands of employees of the e-commerce giant he founded 20 years ago in a small shared apartment in Hangzhou city in eastern China. REUTERS

Jack Ma performs onstage during Alibaba's 20th anniversary party as the co-founder of the Chinese e-commerce giant steps down from his role as the company's chairman, at a stadium in Hangzhou, Zhejiang province, China September 10, 2019. Costumed performers, some dancing to dubstep music and dressed in traditional Chinese dress, and singers paid tribute to Ma's reputation for dressing up and performing at big events, entering to a parade of floats representing Alibaba divisions such as shopping site Tmall and payment service Ant Financial. REUTERS

Jack Ma performs onstage during Alibaba's 20th anniversary party as the co-founder of the Chinese e-commerce giant steps down from his role as the company's chairman, at a stadium in Hangzhou, Zhejiang province, China September 10, 2019. Ma was spotted at one point welling up with tears as staff put on skits and sang songs, prompting the topic "Jack Ma has cried" to trend on Chinese social media platform Weibo. REUTERS

Jack Ma performs onstage during Alibaba's 20th anniversary party as the co-founder of the Chinese e-commerce giant steps down from his role as the company's chairman, at a stadium in Hangzhou, Zhejiang province, China September 10, 2019. Toward the end of the ceremony, Ma, co-founder Lucy Peng, and CEO of Alibaba's technology committee Wang Jian donned rock star-style leather jackets and wigs to perform Chinese pop songs. They were joined by co-founder Joe Tsai dressed in Marilyn Monroe style white dress and a blonde wig. REUTERS

Alibaba's Chief Executive Officer Daniel Zhang attends the company's 20th anniversary party as he takes up Jack Ma's role as the company's chairman, at a stadium in Hangzhou, Zhejiang province, China September 10, 2019. Zhang, also clad in rock star garb, then delivered a solo, having earlier said that Alibaba would keep investing in areas such as cloud computing. REUTERS

Jack Ma attends Alibaba's 20th anniversary party as the co-founder of the Chinese e-commerce giant steps down from his role as the company's chairman, at a stadium in Hangzhou, Zhejiang province, China September 10, 2019. Ma's exit comes as Alibaba has grown to become Asia's most valuable listed company, with a market capitalisation of $460 billion. It employs over 100,000 people, and has expanded into financial services, cloud computing and artificial intelligence. REUTERS