Siheyuan: a Technical Master Who Returned from Harbin Institute of Technology

After graduating from Harbin Institute of Technology at the age of 20, with interstellar black technology in hand, the first thing Zheng Qianrui did when he returned to the courtyard was to straighten out the family tradition. Protecting his sister-in-law, teaching his nephew, and beating up shrews, he used his skills and fists to trample the whole hospital under his feet.