Yu zeqin. Yu zeqin. According to China Youth Network, Yu Zeqin is Cai Yunen's mother-in-law and a native of Chengdu, Sichuan. In life, Yu Zeqin has a unique insight: age is not a problem, and you can do what you want at any time. At this point, grandma is a model. Although she is 100 years old, she is still as lively and cheerful as a child. She likes eating, drinking and enjoying a comfortable life.