Under Temu's semi-hosting model, merchants can use Amazon's multi-channel delivery service (Fulfillment by Amazon, FBA) for delivery.

Here are the specific steps:

1. **Register an Amazon seller account**: If you don't have an Amazon seller account, you need to register one first.

2. **Set up multi-channel delivery**: In the Amazon seller backend, find the settings related to "multi-channel delivery" or "FBA" and follow the instructions to enable the service.

3. **Create a shipping plan**: Create a shipping plan in the Amazon backend, select the products to sell, and associate them with your Temu store.

4. **Prepare products**: Make sure your products meet Amazon's packaging and labeling requirements.

5. **Send to Amazon warehouse**: According to the shipping plan, send the products to the designated Amazon warehouse.

6. **Manage inventory**: Manage your inventory in the Amazon backend to ensure that the inventory is accurate.

7. **Order processing**: When an order is placed in your Temu store, Amazon will handle the order's shipping and customer service.

Please note that using Amazon's multi-channel fulfillment service may involve additional fees, including storage fees, per-piece handling fees, and weight handling fees. In addition, you need to make sure you comply with Amazon's policies and regulations to avoid violations.

In general, when using Amazon's multi-channel fulfillment service, merchants need to pay attention to product packaging and labeling requirements, fee structure, and inventory management. At the same time, due to the high cost of Amazon's multi-channel fulfillment service, merchants need to weigh the pros and cons according to their own situation and choose the appropriate logistics solution.