Wei-Jin dynasty was the founding stage of Twofold Mystery, and Tang dynasty was the golden age of Twofold Mystery as well as the important period of the development of Taoism doctrines.

• 摘要魏晋是重玄学的奠基期，唐代是重玄学的鼎盛期，也是道教教理教义和道教哲学发展的重要时期。