To determine whether a Douyin account is an e-commerce account, you can start from the following aspects:

1. Check the account name and profile: E-commerce accounts often mark their store names, product information, contact information, etc. in the account name and profile, such as "XX Clothing Store", "XX Beauty Official Flagship Store", etc.

2. Observe the video content: The videos posted by e-commerce accounts are often product displays, promotions or user experiences. Product links will be added to the videos to guide users to buy.

3. Check fan interactions: The fan interactions of e-commerce accounts are often related to purchases, such as asking for product details, placing orders, asking after-sales, etc.

4. Check the account shopping cart: Douyin provides a shopping cart function. If there are multiple items in the shopping cart of an account, it is likely to be an e-commerce account.

In short, to determine whether a Douyin account is an e-commerce account, you need to combine the above aspects to make a judgment. If the above aspects all have e-commerce characteristics, then it can be basically confirmed that the account is an e-commerce account.