Our life, to put it bluntly, is to do all kinds of transactions, so I think that in life, trading is the way. Even friendship, love, marriage,

If according to your thinking logic, there is nothing wrong, but you still ignore that all human behaviors are purposeful, that is to say, any human behavior is carried out in order to achieve the goal, then it can be said that in fact, any human behavior belongs to a transaction, but some people get feelings, some people get money, some people get ideals and so on.