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... ongtu seems to like to divide the ranks very much. I heard that he once advocated dividing the pills into ranks one to nine, with nine ranks, among which the first rank is the highest and the ninth rank is the lowest. But for some reason, there was no news about it afterwards."
"The reason is very simple. The grading of pills is based on efficacy, and some pills are not easy to determine. For example, the Yangyang Pill produced by Hehuanzong can be taken from the Yuanying to the Qi tra ...
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