1. Personal safety. Go to remote places at night and try to go with your classmates. Don't go to nightclubs and other places. When traveling, you must find a regular travel agency, and don't be greedy and cheap. Don't casually chat up people you don't know. 2. Money is safe. The living expenses are given by mom and dad after their hard work. When not in use, you'd better deposit it in the bank, and don't leave it anywhere. Bank card \ ID card is open, and the other one is properly kept. Food safety. Eating in schools and canteens is as cheap and hygienic as possible, and cooking oil is safe. Don't eat street stalls and try to eat outside, mainly because tableware disinfection is not in place and cooking oil can't be guaranteed. Eating indiscriminately is easy to infect infectious diseases such as hepatitis and dysentery. 4. Communication security. It is very likely that you will start to fall in love during college. First of all, you should choose a good heterosexual relationship. Don't judge a person only by his appearance or feelings. You'd better know each other's basic situation and family situation before making a decision. Don't get emotional. Be more cautious about people you know online, and you must know them for a long time before you can communicate. Now college students are cheated everywhere. Some are reckless, some are credulous, some are emotional and lose their basic judgment. 5. Political security. Whether speaking or writing articles.