Earning A Small Amount of Profit 6

During the morning of Qi Qingyao's tenth day here, she went to treat Heir Pei with needles as usual. After that, Heir Pei raised a finger limply and pointed to a small package on the bedside table, gesturing for Qi Qingyao to open it.

Curious, she opened it to see a stack of paper money in the package. 

Heir Pei said in a low tone, "This is my payment to you."

"Paper money?" It was quite a hefty stack. On them were the words 'Yongchang Bank' and 'Can be Exchanged'.

Heir Pei was also quite direct. "Silver ingots aren't convenient to carry around. These are paper money issued by Yongchang Bank. You can exchange them for ingots in any branch of theirs around the continent. They're reliable! You can do that any time."

Qi Qingyao licked her thumb, leaving some saliva on the skin, and started counting the money. She counted them twice and confirmed that there were a hundred of these notes in the stack, all of 100 yuan.