The stem comes from the original "Douluo Continent", in which Douluo is the title of the book.
Before he was born, Bidun said in his account that it was Bidun who got pregnant under the pressure of the secret room and gave birth to Chihiro. After the death of her daughter Qian Qiu, this incident was called "the secret room", so Chihiro disease was also called the secret room.
The influence of the chamber of secrets
Because Douro in the Chamber of Secrets has angel blood, Jane He Xue has a chance to inherit the angel god, and because she is stronger than Dong and Chihiro, Jane He Xue has a stronger gene to inherit the angel god. The innate total soul strength is 20, which is the height that Tang San never reached, and the angel god was also created by Chihiro.