For tradable funds, they can be traded online like stocks.

For non-trading open-end funds, although you can't buy and sell like stocks, you can apply for subscription and redemption online, which is actually similar to online trading, except that your counterparty is different and the price formation method is different. The procedure is very simple. The first step is to open an account with a securities company, preferably a bigger one, because they sell a lot of funds, and a small securities company may not necessarily sell the fund products you want to do. Just open a fund account here and it should be free. The second step is to go home and log in to the online trading system, choose the fund products you want to buy, and then purchase or subscribe. If it shows that you can't purchase, you can open your own account with the corresponding fund company in the trading system. . . These things are complicated to say and simple to do. I believe you can handle it yourself when you see that trading system.

Open-end funds and closed-end funds are two types of funds. Open means open subscription, and investors can conduct fund transactions with fund companies during the duration; Closed is the existence that cannot be purchased and redeemed, but it can be listed and traded.

What I said is my understanding. If you want to see the concept, you can find Baidu Encyclopedia yourself, which is very comprehensive.