First of all, you need to have a brokerage account, open the A-share trading authority, open a capital account with the brokerage firm, and sign a transfer custody business contract, and that's all.

Generally used brokerage fund accounts buy fund shares in the primary market, and then submit an application for re-custody. Generally, after 2-3 days, it will be transferred from off-site to on-site and can be traded freely in the secondary market.

If the fund you buy is not on the brokerage platform, but on a third-party fund agency platform like Alipay, then it cannot be transferred to the market.