The witch tells the doctor that she is going to sell the "life extension pill" to the dying. The doctor says that he will not sell the product without a license. The witch says that she has prepared a hundred thousand dollars for the sale of the product, but she will not tell the doctor how much she has already paid. She says that if the product does not extend the life of the patient, then the patient should not buy it. The woman says she will pay half of the price when the product works, and the other half when it does not. She promises to be at the hospital on the day of the sale. The teacher says that the finance department is there to ask if Tang zheng has paid all of the tuition fees