Refining poison was not simple. Would Liu Sanniang really teach Su Yanyu this ability?
Marquis Su and Mrs. Su had never expected this. They felt that Su Yanyu would just be treated as an errand boy.
Both of them had mixed feelings and remained in disbelief.
Su Yanyu said seriously, "Father, Mother, don't tell anyone about this. Miss Liu is teaching me seriously. I've already started to make incense."
Making incense was the most difficult.
There were thousands to tens of thousands of types of insects that could be made into poison. Humans could only live for a hundred years, so they naturally could not learn it all.
Marquis Su looked at Su Yanyu with mixed feelings.
Mrs. Su was capable, and Su Yanyu was not bad either. If he could master the skill of refining poison, who would dare to provoke him in the future?