The profit of Beidaihe seafood buffet can earn about 20 thousand a month. According to Q-Q.com, the daily effective passenger flow of Beidaihe Seafood Cafeteria can reach about 35 people, and the consumption amount is about 80- 120 yuan. Here, let's calculate the consumption of 80 yuan per person. Then the daily turnover is 2800 yuan, and the monthly sales is 84000 yuan. The gross profit after excluding the purchase cost and logistics cost is calculated at 60% per month, and the gross profit per month is 50,000 yuan. Excluding the fixed cost of 30,000 yuan per month, the monthly net profit is 20,000 yuan and the annual net profit is 244,000 yuan.