The main logistics and distribution models of Alibaba 1688 are as follows:

1. Merchant self-delivery: Merchants choose logistics companies to deliver goods according to order information. In this model, merchants have greater autonomy and can choose suitable logistics service providers and delivery methods according to their own needs.

2. Logistics sorting and delivery: Merchants send goods to Alibaba's warehouse in batches, and Alibaba is responsible for sorting and delivery. This model can improve logistics efficiency and reduce merchants' logistics costs and operating pressure.

3. Logistics warehousing cooperation: Merchants deposit goods in Alibaba's logistics warehouse, and Alibaba is responsible for warehousing and delivery. This model can help merchants solve warehousing problems and improve order processing speed and delivery efficiency.

4. Logistics partners: Alibaba has established partnerships with major logistics companies, and merchants can directly choose cooperative logistics service providers for delivery through the Alibaba platform. In this model, merchants can enjoy the professional delivery services and preferential policies of logistics service providers.

5. Intelligent logistics: Alibaba provides intelligent logistics solutions by introducing intelligent logistics technology. For example, by using big data analysis and artificial intelligence technology, it provides merchants with optimized route planning, warehouse management and distribution services to improve logistics efficiency and user experience.

In general, Alibaba 1688 has diversified logistics distribution models, and can choose the appropriate distribution method according to the needs and actual situation of merchants. These models are designed to improve logistics efficiency, reduce costs, and provide merchants and consumers with a better logistics experience.