Is the "boundless ancestor" a Taoist immortal or a Buddhist bodhisattva?

That is, Zhenwu Emperor, also known as Tian Xuan God, Xuanwu Emperor, Tian Xuan God, God of Blessing the Sage, God of Grinding Heaven, Grandpa of Grinding for Nine Days, and Grandpa of Infinity, is a northern god in Han mythology and legend, and a famous scenic god among Taoist immortals. At present, the god worshipped in Wudang Mountain, Hubei Province is Zhenwu Emperor, which is called "the innocent Wuling should help the holy emperor" in Taoist scriptures, and is called "Zhenwu Emperor" for short. Han people call it the demon Buddha, the founder, and the founder. After the Ming Dynasty, it had a great influence throughout the country, especially the folk beliefs of the Han nationality in modern China!