Legal analysis: it needs two aspects. The computer system cancelled the doctor's orders. If the system prompt has been implemented, you need to ask the nurse to refund the fee first, and then cancel or void the doctor's order. In addition, the medical record paper doctor's order needs to be manually cancelled in red pen on that line, and then signed and dated.

Legal basis: Article 135 of the Civil Law of People's Republic of China (PRC) stipulates that a will shall be made by two or more witnesses, one of whom shall write it, and the testator, the agent and other witnesses shall sign it, indicating the year, month and day.