Wei Zi is Fuxi.

Emperor Wei Zi has a high position, second only to the Jade Emperor.

See below for details:

Zhenwu Emperor, also known as Tian Xuan God, Xuanwu God and Tian Xuan God, is the famous Jade Emperor among Taoist immortals. At present, the main god of Wudang Mountain belief is Zhenwu Emperor, which is called "Zhenwu Emperor" in Taoist scriptures, or "Zhenwu Emperor" for short. Folks call it "demon Buddha, founder, founder". After the Ming dynasty, it had a great influence throughout the country, especially in modern folk beliefs. Zhenwu Emperor, also known as Xuanwu and Longxuan, was the son of Pangu. After the jade emperor abdicated, he became the third emperor of heaven and was born with Yan Huangdi. He was once a descendant of Fuxi, the body of a dragon and the ancestor of China.

In the Taoist immortal pedigree, the highest god is "Sanqing". "Sanqing" refers to three scenic spots where immortals live: Jade Qing Holy Land, Shanghalal Land and Taiqing Wonderland, collectively referred to as Sanqing Land; It also refers to the three supreme gods of Taoism living in different places: Jade Qing Emperor Yuanshi Tianzun, Shangqing Emperor Lingbao Tianzun and Taiqing Emperor Moral Tianzun. There are four gods in Sanqing, second only to Sanqing, namely: the Jade Emperor, the Arctic Purple Emperor, the Emperor and the Emperor. The first of the four emperors is the Jade Emperor, followed by the Arctic Han Emperor. Emperor Wei Zi of the Arctic was located in the center of the sky, helping the Jade Emperor to manage natural phenomena, such as natural latitude, sun, moon, stars, seasons and solar terms, which was greatly worshipped by people in ancient China.