Friend.
As you grow older, you will wave goodbye to your former friends, in fact, the biggest difference between anyone is not height and skin color, language, but thoughts, some people in life look like people, but they are actually soulless walking dead, they because of their knowledge and culture, limited knowledge, produced a unique narrow and selfish values, some troubles in life are mostly caused by complex interpersonal relationships, learn to do subtraction life, you will become more and more intelligent and happier.
The difference in values, morals, and outlook on life is huge, you don't believe that you can talk about 100 yuan manufacturing anti-counterfeiting technology with a friend who only knows 1 yuan, yes, just know and not see.
Because they only know how to be brave when they are safe, generous when they are free, emotional when they are shallow, sincere when they are stupid, and friends who are fine but not more, the better you are, the more independent you will be, not lonely, learn to have independent thoughts, let culture and knowledge become your left and right oars to help you sail to the other side of success in life.