Open a wheel cake shop in Chengde to make money. To open a 30-square-meter wheel cake shop in the city, the monthly miscellaneous expenses such as rent, salary, water and electricity are about 1.38 million yuan, of which the daily turnover is 2,400 yuan, and the monthly turnover is 72,000 yuan. According to the gross profit margin of 65%, the monthly net profit of joining wheel cakes in the city can reach 33,000 yuan, and the annual profit is as high as 396,000 yuan.