For example, at the time of purchase, the net value of the fund is 1.5 yuan. Recently, the net value of the fund is between 1.2- 1.3 yuan, which seems to be a loss. However, from the perspective of long-term holding, one year later, the net value of the fund becomes 2 yuan, so that although the fund falls in the short term, it can return to its original value in the long term.