In Green Tea, are Mandy and Wu Fang played by Zhao Wei alone in the plot?

It's a female graduate student, Zhao Wei, and a prostitute, that is, Lang Lang and Wu Fang are actually the same person. She has been telling the story of her "friend", but in fact she is telling the shadow of her childhood. Every blind date, she tells this story to others first, in fact, to see who really wants to know her. At first, she didn't admit that it was day and night because she still had some scruples, but she used green tea to tell her fortune. Jiang Wen saw the flaw from now on, and as a result, Jiang Wen successfully entered her world.