This article is an advanced version of the previous WEB3 wallet tutorial on buying and selling MeMe tokens, mainly explaining how to quickly participate in on-chain transactions using exchange funds. One thing to note: when buying, you can directly use the exchange balance, but after selling, the funds will go into your wallet, so you need to understand basic operations like wallet transfers, GAS fees, and network selection.

Let's take a popular token on the BSC chain as an example. Before starting, make sure your spot account on the exchange has enough BNB or USDT.

**Steps:**

Open your wallet, search for the token's CA address. After finding the token, click on the avatar or name to go to the token detail page. At this point, click the exchange button, and the key step is to check the "Use exchange balance" option.

Enter the amount you want to buy. For example, this time I will try to buy $5 worth of tokens using the exchange's USDT, then confirm the order. Wait a moment, go to the asset page and check the transaction record—you should see the newly purchased tokens.

If you want to sell, the process is also straightforward. Select the token, and if selling all, choose "All." Remember to check the MEV protection (this is very important, as it protects your slippage). After a successful sale, USDT will be credited to your wallet address. The last step is to transfer the funds from your wallet back to the exchange for easier operations next time.

Repeating this process a few times will make you more proficient. If you have questions or notice anything incorrect, feel free to add or correct.