The allusion of Lv Dongbin's alchemy is that kung fu is as usual, and there is no need for quick success. He had taken the exam ten times before going to school and was indifferent to all kinds of situations. Therefore, the teacher (Zhong Liquan) was extremely satisfied with Dong Bin's performance and said, "I will pass on Huang Bai's skill (that is, the method of alchemy) today, so as to help the world and benefit things, achieve 3,000 achievements and complete 800 lines, and then I will visit you." Later, Dong Bin was officially accepted as an apprentice. Thus, Lv Dongbin's alchemy does not need to practice meditation with heart.
The moral is to work hard as usual, do not need quick success and instant benefit, and be indifferent to all kinds of situations.
It wants to tell us that the most powerful kung fu is that you can't see "kung fu". Only by eliminating the idea of quick success and instant benefit can we complete our career and be indifferent to all kinds of situations.
It means that some things seem simple, but they have to go through a lot of tempering to succeed.