When the fund adds a position, the subscription fee = turnover × subscription rate, in which the subscription rate is inversely proportional to the turnover, that is, the larger the turnover, the lower the subscription rate, and even the case where the subscription rate is 0, the smaller the turnover, the higher the subscription rate.

Fund, in English, refers to a certain amount of funds set up for a certain purpose. It mainly includes trust and investment funds, provident funds, insurance funds, retirement funds and funds of various foundations.