As a traditional folk medicine, the inheritance and development of Taoist doctors are often carried out between families or between teachers and apprentices. Unlike modern medicine, Taoist doctors are open and transparent and rely more on word of mouth. So traditionally, the contents of Taoist doctors are confidential.

In addition, some magic and metaphysics in Taoism are often considered profound and will only be revealed on specific occasions or to specific people. This has further strengthened the tradition of keeping the contents of Taoist doctors confidential.

At the same time, we should also pay attention to that not everyone can practice and master Taoist doctors, and their skills need to have a certain mind, character, talent and opportunity to master them step by step. Therefore, the secret biography is not only to protect the tradition and uniqueness of Taoist doctors, but also to ensure the quality and continuity of Taoist skills.