Ten years old refers to ten years, and it is called a person who is seventy or eighty years old. Xunzi's pinyin is xún, which means the ten-day cycle from Tiangan Jiazi Day to Deception Day, and later refers to ten years, which can be extended to a complete cycle in time.

"Ten-day" example:

1, Yan Fu translated many western works with a serious attitude of "one name stands, ten days hesitate".

2. The District Development and Reform Commission changed the "green channel" project tracked by department-level cadres from ten-day newspaper to weekly newspaper.

I tried it in mid-January, when it snowed heavily, but I may need to find many reasons to take off my clothes in that weather.