C142 You Are Trying to Make Use of Your Old Age

Only then did Chu Xuan understand the reason behind the anger of the old Chinese medical doctor. He felt that this old man was rather cute, at least responsible, and his affability level towards him rose by several points.

"Old man, calm down, I naturally know about these basic pharmacology. However, since I've already said that this is a secret, I naturally cannot say it. You don't need to ask