Fix the video conference. The online final exam can take the form of nail video conference. Candidates bring their own mobile phones, tablets, computers and other electronic devices, which are fully charged before the exam to prevent network interruption during the exam. The invigilator initiates a video conference five minutes in advance and sends the test questions to the nail group or WeChat group, and reminds the candidates to turn off the wheat by themselves to ensure the examination environment of other students. Candidates aim the cameras of electronic devices such as mobile phones or tablet computers at themselves and the answer sheets, and at the same time ensure a quiet examination environment, tidy up their desks in advance and prepare toilet paper and stationery. Hand in your papers within five minutes after the exam. After the invigilator counts the number of papers submitted, the candidates can quit or close the video after hearing the instructions.