Jiangcheng in July is like a huge steamer, the asphalt roads are softened by the sun, and the air is filled with the mixed smell of car exhaust and roadside food stalls. Lin Yue squatted at the alley at the back door of the antique city, fanning himself with cardboard, looking at the several "treasures" placed on the folding table in front of him, and frowned in worry.