According to China's historical records, Xuanyuan Huangdi unified the tribes in China after Emperor Yan. He calculated the calendar; Teach people to sow food; Xing characters; Make branches, make musical instruments and make medicine. Auspicious time: The emperor made a big noise as Jiazi, and took the ten-day trunk and twelve-day branch as auspicious time, which has been used in the lunar calendar up to now (Jiazi, Ebou, Guihai, * * * 60 years as a cycle), that is, the 60th anniversary of Taoism.

Mathematics: A system for making numbers and setting weights and measures.

Jun: After the wind, you can catch strange pictures and make array methods.

Music: Linglun takes the bamboo in the valley as the flute tube and sets five tones and twelve methods, which are suitable for today.

Clothes: Lei Zu, Princess of the Yuan Dynasty, began to raise silkworms and make silk clothes.

Medicine: Discuss pathology with Qi Bo and write Neijing.

Writing: Cang Xie started writing with six books.

Casting: Making money with copper from Shoushan (Nanwuli, Xiangcheng County, Henan Province).

Others: the invention of ships, bows and arrows, houses, etc.

If you want to say when to start real clothes, it should be this time. It used to be wrapped in bark, leaves or cloth. )

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