After reading Wang Dana's tweet, I also have a story that belongs to the big brothers in society. I met this big brother in a friend's office. He used to be a big shot at a certain exchange, and his identity was verified to be real. He did indeed earn a lot of money during a certain period of time. However, with the end of the exchange, he spent a long time in the trading circle. In fact, it's not right to say he was in the trading circle because although he walked the trading circle, he did all the work that mice know.