When Ye Qiu was 4 years old, he grabbed the newborn baby girl next door, looked left and right, and then kissed the baby girl on the face for a while.
"My name is Ye Qiu, and you should call me Ye Zhiqiu. When you grow up, others will know that you are mine."
Grandma's baby voice amused a circle of adults who were watching.
One leaf knows autumn.
This is an idiom Ye Qiu just learned that morning.