What contribution does Lei Gong's machining theory make to machining?

Liu wrote in the Southern Dynasties. The Theory of Leigong Processing, also known as the Theory of Leigong Processing, consists of three volumes, which systematically discusses the processing theory of traditional Chinese medicine and specifically introduces the processing methods of 300 commonly used traditional Chinese medicines, so it is highly praised by ancient and modern pharmacists. This book has been rewritten and circulated, but the original has long been lost, making it difficult for readers to get a glimpse of the old face. During the Ming and Qing Dynasties, there were many works with the theme of "What Lei Gong did".