First of all, there is no distinction between capital preservation and non-capital preservation. What you want to measure is the income of the fund and other factors. No matter how good the fund is, it may lose money when the market is bad. Secondly, the amount invested each month depends on the individual's income. I will make a fixed investment in 300 yuan every month, which is a long-term investment, and the income is still very objective, depending on the fund you buy. You can go to the outlets of Industrial Bank and ask a professional financial manager to choose a fund that suits you.