The profit and loss of fund positions refers to the total income of the fund since holding the fund (generally referring to the income of a single fund), and the profit and loss of the fund yesterday refers to the income obtained by the fund on the previous trading day (generally referring to the income of all investors holding the fund).
Fund income = (current fund net value-net value when buying the fund) * fund share-fund handling fee. Fund income is determined by the investment target. Investment targets go up, funds go up, investment targets go down, and funds go down.