Penicillin

After waiting a short while, the tall and husky man appeared at the front of the door. He took a glimpse and saw the both of them, nodded his head in their direction, and turned around to open the door.

Ren Baqian handed over the bundle that he was carrying to the man. Inside was the 130 taels of silver which he and Caretaker Shi had pooled together. It was indeed tiring to carry more than 10 catties worth of silver for almost an hour.

After inspecting the silver, the husky man dashed towards the both of them and nodded his head. At long last, he revealed a smile.

Caretaker Shi then took out a slip of paper and red clay which he had prepared earlier on. After taking a quick look, the man pressed his thumbprint on it. From now onwards, the shop belonged to Ren Baqian and Caretaker Shi for the following year.

"How should we address brother? If there's any problem, how can we locate you?" Seeing that he sealed the contract, Ren Baqian was full of smiles.