Bianliang City is already a bit hot in early summer, and cicadas are chirping from the sycamore tree in the backyard of Wantong Trading Company. Uncle Ai Xi was sitting by the window, holding a piece of hemp paper full of writing in his hand, frowning slightly - this was a "price adjustment letter" sent by Jiangnan silk supplier Shen. The letter said that Jiangnan suffered floods this year, the cocoon production was reduced, and the cost of silk rose. From next month, the supply price of each piece of Hangzhou silk will increase by five copper plates, and the supply price of each piece of Shu brocade will increase by eight copper plates.