Although Obsidian Day originated in China, the seven-day cycle is rarely used in China. Before that, it was rarely used, but it was marked on the 10th and the first day of the month (18th and15th), so Obsidian Day has never been handed down.

So this thing is not the loss of culture, but it is not the main part of China culture.

The week mentioned upstairs appeared in the Republic of China, not so late. It was used in the Qing dynasty two or three hundred years ago.

However, Xunzi and Wang Shuo have not been handed down, which can be said to be a cultural loss.