There are many kinds of index funds that invest in the Shanghai and Shenzhen 300 Index, including index ETF funds and index ETF linked funds. The two funds are purchased in different ways. ETF funds need to open stock accounts and buy them in brokerage software, just like buying stocks; ETF-linked funds can be purchased on a third-party fund platform or directly from the fund company official website.

The following is a detailed introduction to these three purchase methods:

1. Buy the CSI 300 Index Fund on the brokerage platform: The process of buying the CSI 300 Index Fund on the brokerage platform is the same as buying stocks. First of all, investors need to open securities accounts, and now they can choose convenient online channels to open accounts. After everything is ready, you can choose the corresponding Shanghai and Shenzhen 300 index funds to buy.

2. Purchase the CSI 300 Index Fund on the third-party fund platform: The third-party fund platform includes Alipay (wealth plate), WeChat Wealth Management, and Tian Tian Fund owned by traditional brokers. Index funds purchased on these platforms are generally ETF-linked funds, that is, funds that invest in ETF funds. When purchasing such funds on a third-party fund platform, the general subscription fee is 1 discount, which is about 0. 15%. 3. Buy the CSI 300 Index Fund from the fund company official website: You can also buy the CSI 300 Index Fund directly from the fund company official website or the fund company's APP. Generally, it is also an ETF linked fund. Usually, it is more favorable to buy funds directly under the fund company, and the subscription fee can be 1 to 1.5 fold.