What contribution did Emperor Yanhuang make in history?

In ancient times, people lived by fishing and hunting, lived in caves and wore leaves, knowing their mothers but not their fathers. Henan Xinzheng Renxiong married the daughter of An Deng and Gao, and gave birth to Emperor Yan and Yellow Emperor. Born in Huayang (now the northern part of Huayang County, xinzheng city), he grew up, so his surname is Jiang. He started from Lieshan Mountain, so he was called because of his virtue of fire. He worked as a farmer, grew grain, tasted medicine, promoted medicine, and opened the market for trade. His ministers respected him as the son of heaven, so he was named Shennong and buried in Chaling, Yanling County, Hunan Province. Huangdi was born in today's Xuanyuan Mountain, the hometown of Huangdi in xinzheng city. Because his surname is Xuanyuan, Gongsun and longer than Ji Shui, his surname is Ji. He is the monarch. They all have bears. His name is Bear. He is the king of the land, so he is called the Yellow Emperor. Shennong's world declined and vassals invaded each other. The Yellow Emperor rallied troops, joined Yandi to Hanquan, and won Zhuolu's Chiyou, thus unifying all the countries, integrating Wan's family into China, and the governors were honored as emperors, replacing Shennong. East to the sea, west to Kongtong, south to the Yangtze River and north to Yanshan. Founding the chieftain kingdom, dividing fields into states, planting eunuchs everywhere, observing countries, building cities, palaces, ships and cars, casting bronze tripod, raising silkworms, making clothes, creating characters, setting the tone, formulating etiquette, performing array, welcoming marriage, inspiring Chinese civilization and laying the foundation for China. He reigned for one hundred years and was buried in Qiao Shan, which is now huangling county, Shaanxi Province. The height of the world is only yellow. During the Three Dynasties, he was revered as the ancestor of mankind. In previous dynasties, Hua Tuo claimed to be the descendant of the Yellow Emperor.