Replenishment of variant products operated by Amazon mainly involves the following steps:

1. Monitor inventory: Regularly monitor the inventory levels of your variant products. You can use the inventory management tools in Amazon Seller Center to track the inventory status of each variant product.

2. Set replenishment trigger points: Set a replenishment trigger point, that is, when the product inventory drops to a certain level, the replenishment operation is triggered. This trigger point should be determined based on factors such as your sales volume, replenishment cycle and delivery time.

3. Calculate the replenishment quantity: Based on sales trends and inventory requirements, calculate the quantity required for replenishment. You can analyze factors such as historical sales data, market demand and competition to determine the appropriate replenishment quantity.

4. Select suppliers: Select the right supplier for replenishment based on your needs and conditions. You can contact existing suppliers or find new suppliers to ensure the timely arrival of goods.

5. Order and delivery: Negotiate with the selected supplier and place an order for the required quantity of products. Make sure to communicate with suppliers about delivery time and delivery methods so that inventory can be replenished in time.

6. Update Amazon platform information: Once the replenishment arrives, update the inventory information in Amazon Seller Center in time. This will ensure that your products show the correct inventory on the Amazon platform.

Please note that the above steps are for reference only, and the actual replenishment process may vary depending on the actual situation. It is recommended that you manage replenishment according to your business needs and experience.