The Biography of the Counselor in the Early Ming Dynasty

I have a question, but of course it's a little late to ask it now. I saw that the protagonist has reached the sixth rank and is not as fiercely inventive as before. After all, the character is described as small and cautious. Wine can be sold with the emperor's certification, but penicillin dare not show off. Why not bring back the soap? You are now in the sixth rank and a popular person in the palace. If you were just a few subordinates who were in trouble at the beginning, you should have come and knelt down to apologize. If the subordinates were instigated by others, they would most likely be gone after the previous purge, right? In fact, the protagonist should have brought back the soap technology when he was practicing medicine. Promoting cleanliness would be of great benefit to epidemic diseases. It is appropriate for him to do this as a doctor. There is also cement technology. I just saw a story about the protagonist riding a horse on a road that is difficult to walk and wears his thighs. Travelers should be able to think of cement. The protagonist has tried it before. If we want to carry out water conservancy projects to control the Yellow River, cement will be very useful.