Yes, Guantingna appeared as soon as he fell in love in China. She plays Xie Xiaomei's friend.

I don't remember the specific episodes, but in later episodes, Liu Yishui decided to propose to Xie Xiaomei. At that time, Xie Xiaomei and her friends were on the treadmill in the gym. One of her two friends was played by Guantingna.