Both will do. One-time buying is suitable for investors who have frequent trading and certain trading experience, and fixed investment is more suitable for investors who have no time to watch the market and have no trading experience.

In China stock market, cows are short and bears are long. In a bull market, investors can buy at one time. In a bear market, investors can choose to vote. The biggest advantage of fixed investment is that it disperses investment risks. The lower the index, the more cost-effective, and the average income will be obtained if the fund invests.