First of all, you must check the regular report of the fund. Generally, only the top ten positions will be announced in the quarterly report, and at the time of announcement, some fund companies may have changed positions. However, you can download a great wisdom software, in which the ups and downs of each stock are very clear. At the same time, if the heavyweights rise, the net value of the fund will also rise, which means that the position of the fund has not changed much. In addition, we can also compare the changes of the fund's heavy positions every quarter, from which we can also see the frequency of changing positions of a fund company.