Alibaba's founder Jack Ma has the oratory skills of Steve Jobs and the stage presence of Richard Simmons, and his send off after 20 years helming the company he founded was every bit spectacular.

Appearing before an audience of 60,000 Alibaba employees in China's Hangzhou Olympic Sports Center, Ma delivered remarks and even several songs, while wearing a leather-studded jacket and Mohawk. After retiring as executive chairman this week, the entrepreneur plans to devote himself to philanthropic causes. Succeeding Ma as chairman will be Alibaba's current CEO Daniel Zhang.

Ma stepped down as the day-to-day leader of the company, which is now valued at close to half a trillion dollars and is considered one of China's most valuable companies, in 2013, but he has since served as its top inspirer-in-chief. 

Here's a brief look at the many faces of the eccentric billionaire entrepreneur Jack Ma: