The female fitness instructor in the TV series My Best Friend is played by Chen Bige. According to tv cat official website, the female fitness instructor in My Best Friend was played by Chen Bige. In the play, she is very temperamental and has a perfect figure ratio, which is sought after by many people. Chen Bige,1was born in Nanchong, Sichuan on March 20th, 990. She is an actress in Chinese mainland and graduated from Sichuan Conservatory of Music with a major in classical music performance.