The above funds invest in the stock market, but the number of stocks invested by a fund is generally dozens.
Although the unsystematic risk of a single stock has an impact on the overall fund operation, the impact will not be so great as to be delisted.
There are rules for fund delisting. For example, if there are too few operating surplus assets, they will be delisted to some extent.
The reason for delisting is that the management fee is too small (because there are too few funds), so it is impossible to operate.
Even if you quit the market, your money will still be returned to you.