1. Set inventory reservation: Set the inventory reserve for the product in the Doudian background. Even if the product has been sold, the reserved inventory will still be retained until the order is completed.

2. Limit the purchase quantity: Set the purchase limit quantity on the product details page to ensure that the quantity purchased by each buyer does not exceed the set quantity.

3. Turn on the flash sale mode: Within a specific time, put the inventory of the product in the flash sale mode, and sell the product through a limited-time rush sale to ensure that the inventory will not be snapped up by buyers at one time.

4. Real-time inventory update: Turn on the real-time inventory update function in the Doudian background. When a buyer places an order, the system will automatically update the inventory quantity to avoid overselling of inventory.

5. Pre-sale mode: When the product is not on the shelf, you can lock the inventory through the pre-sale mode. When the product is officially on the shelf, a certain amount of inventory has been locked to ensure that the inventory will not be snapped up at one time.