The night before, start slowly exhibiting signs of illness. Talk about how you are feeling lightheaded, don't eat all of your dinner, and consider going to bed earlier than you usually do - although you don't have to go to sleep. Your goal is to implant the idea that you don't feel well into others' heads rather than outright say, "I feel sick." This helps to make your symptoms seem more convincing to others as you haven't brought up the fact that you might be ill yourself. Nobody suddenly becomes sick, the symptoms slowly build until they become overwhelming to the afflicted person. Start off slow, with some light coughing or sniffling if you want to imitate a cold or the flu, or act more sluggish and react slower to things if you want to imitate nausea. Most people who are badly sick have trouble sleeping (unless they've had a lot of drowsy medication). Stay up a few hours later than you usually would to give yourself noticeable bags under your eyes.  This can be a physical indicator that you had trouble sleeping to others, when in fact you stayed up having a jolly old time to yourself. You can also use a small amount of eyeshadow to complete the effect, but be careful not to go overboard because if someone notices that you are wearing eyeshadow and aren't actually tired, your act will be shattered. The number one things that get people caught faking an illness is getting caught doing something fun and exciting instead of staying home to recover. Take a day away from social media, cancel any plans you made with your friends, and stay at home the whole day. You don't want anybody finding out the truth about your ruse.

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Write a summary of the previous text in Chinese:
正式“生病”的前一天，你就要告诉别人你出现了哪些症状。 在接下里的两三个小时里，你要慢慢表现出所患病的症状。 为了造成睡不着的假象，你可以熬到很晚才上床，这样就能熬出浮肿的双眼。 装病时不要安排其它社交活动。