Yiyi Yaya is a pair of twins in Fujian and an online celebrity. Yiyi Yaya and her sisters often dance in the street, infecting passers-by with happiness. Their videos have also won more than 1 billion praises on the Internet. On the Internet, they got sick. It's just groundless.

Twins refer to the situation that viviparous animals give birth to two individuals at a time, which is called twins for short.