Before revision: For instance, the Daoist Qigong found it philosophical roots in the Dao De Jing, its features techniques of internal elixir emerged in the Eastern Han dynasty and reached a level of maturity in the Ming and Qing dynasty.
After revision: Daoist Qigong found it philosophical roots in the Dao De Jing, its features techniques of internal elixir emerged in the Eastern Han dynasty and reached a level of maturity in the Ming and Qing dynasty.