C241 Manufacturing master(part i)

My heart suddenly sank. This Liu Yu seems to be different from the one I met previously, but I couldn't tell where he had a problem.

I threw the piece of skin far away.

On the way home, I called Brother Peng because I had thought about it for a whole day and found a lot of clues from Teacher Yang Caier's words. Right now, it seems that the most important thing for me is the Second Master