C139 Detoxification

Pu Yu took the knife and made a small cut on Old Master Zhou's back.

It wasn't a big cut, maybe less than a centimeter.

Then, Pu Yu took out a leather tube from his black cloth bag and put it into the opening. At the other end of the tube, there was something that looked like a extruder.

"Hiss!"

Pu Yu pressed the extruder on the other end of the tube.

In an instant