China ancient Taoist alchemy can be divided into inner alchemy and outer alchemy. Waidan is an elixir made of various minerals and plants. In the Journey to the West, the Monkey King stole the elixir of Taishang Laojun, which was called Waidan, and was mostly used to save lives and improve his practice.
The most fundamental and superior cultivation method of Taoism is the avenue. However, since ancient times, the avenue has been kept secret, and it has only been taught secretly between Zongmen and tutors. When it comes to contemporary qigong, most of them borrowed some terms from the avenue at that time, but they all taught some small spells of Taoism, which was far from the real avenue at that time.
These small practices are all under the banner of quick success, such as 200 natural dharma bodies and 300 natural goddess of Yin and Yang. So that the real "so avenue" was misunderstood, not to mention the real formula was corrected according to law.
It is really heartbreaking that the treasure of the ages is so dusty. The true second cultivation of Dan Dao originated from Chen Tuan, the founder of Huashan (Sleeping Immortal) School in the Northern Song Dynasty. Due to the friendly relationship between Chen Tuan's founder and Lu Dong's founder, this mentality may be related to the northern, southern, eastern and western factions of Dandao in later generations.
Then the practice of the avenue is inseparable from the operation and practice on Sunday. But the operation method of Sunday is different from that of Feidan Avenue, and it can never be equated. As far as Sunday is concerned, it can be roughly divided into the following three types: the first one is the idea of Sunday. Second, qi and blood surround the sky. The third kind of single-pole Sunday.