China's first biographical history book, Historical Records of Xuanyuan, highly summarized the life of Xuanyuan Huangdi in five words:

Fight and learn from the gods.

After being inspired by Guangna, he bid farewell to the mountains and was greeted with honor and success in front of the thatched cottage covered with imperata. Rong Chenggong is one of his teachers and the only one who has shared a room with him in the past three months. This story is recorded in Liezi Tang Wen ("Only the Yellow Emperor and Rong live in an empty hole, and it is useless to have a dead heart").

Rong Chenggong did not follow Xuanyuan Huangdi back to Beijing, but stayed in Kongtong Mountain. Maybe it's because his mission has been completed, or maybe he wants to continue his studies in Cheng Zi. It is said that Rong Chenggong's life span at that time was 200 years old, which was a little immature compared with Guang 1200 years old. China's first biography gave a systematic account of immortals, which was recorded in the Legend of Immortals in the Western Han Dynasty and Xuanyuan's Biography in the Northern Song Dynasty (making good use of the technique of harming the public, nourishing life and nourishing qi, making the Valley God immortal, making his white hair black, reviving his teeth, and the Yellow Emperor envied his way).

Xuanyuan Huangdi was reluctant and his face changed a little. After he returned to Beijing, he also built "the 12th floor of five cities, waiting for the gods to come". It is very important for him to be a man of God. Rongcheng Gong is recognized as having two main identities: one is the home in the room (the twenty-eight volumes of Rongcheng Vagina published by Han Shuzhi are listed as the home in the room). During the Han and Jin dynasties, the art of coitus was widely circulated, and the reputation of glory and success was also the highest, but "Rong Chengfa" was gradually replaced by "Peng Zufa". Why? Is it because of age again? After all, Peng Zu lived for more than 800 years. Another identity of Rong Chenggong is Yin and Yang (fourteen articles of Rong Chengzi belong to Yin and Yang).

However, he still has two little-known important identities: one is the inventor of Weiqi, Lin Yinglong, a famous chess player in China in the Ming Dynasty and an outstanding Weiqi editor in the history of Weiqi in China, clearly recorded in his book "Yi Qing Lu": "Yi: Weiqi is a Rongcheng office system, and its black-and-white winning and losing machine, that is, the way of ups and downs of Yin and Yang, has a complicated history." This is consistent with Rong's successful confirmation of the identity of Yin and Yang family. Another important identity of Rong's success is one of the three founders of the Taoist baohe school.

The so-called "Baohe", alias "Pigu" and "Baohe Sect", is a sect in Buddhism that practices by the way of Pigu.