Zhang Wuji's Son in the Great Ming! How Did I Become a Bailiff?

I! Zhang Chengyan! Son of Zhang Wuji of the Great Ming! My medical skills are unmatched. It shouldn't be strange that I saved Chang Yuchun, right? And surely there was nothing wrong with saving Zhu Biao and his son while I was at it? If that's still not enough, I also saved Empress Ma and the Crown Princess. That should count, right? But why, when I just want to lie flat and open a clinic, are you making me a constable!? Fine, I can be a constable. I'll do my best. But why do your men want to cut me down!? Old Zhu, are you really forcing me to flip the table? Do you think my Nine Yang Divine Skill is just for show?!