Let me calculate it for you. Per Jin 18 yuan, you put 1000 Jin per mu, and double it to 2000 Jin. The cost of removing 1000 Jin is 18 yuan, and the price is 30,000 yuan per Jin 15 yuan. Even if it's good to raise it twice, it will cost 3000 Jin 45000 yuan and 3 tons of materials. One ton of material is 3500. Do you think making money?