The reason why products cannot be listed on AliExpress is due to the following restrictions. First, the AliExpress platform has restrictions on certain specific categories of products, such as some products involving copyright, intellectual property rights or legal and regulatory restrictions. Secondly, AliExpress also has restrictions on some sensitive or dangerous goods to ensure the safety and compliance of users. In addition, AliExpress will also review and restrict some products of low quality or violating platform regulations. Therefore, if a product cannot be listed on AliExpress, it may be because it belongs to a restricted category, involves sensitive or dangerous goods, or does not meet the quality requirements and regulations of the platform. In addition to the restrictions of the AliExpress platform, there are other factors that may cause a product to be unable to be listed. For example, the supplier may not meet the requirements of AliExpress, such as lacking the necessary certification or qualifications. In addition, factors such as the price, quality, and market competition of the product may also affect whether the product can be successfully sold on AliExpress. Therefore, when choosing AliExpress as a sales channel, you need to carefully understand the regulations and requirements of the platform and ensure that the product meets the relevant standards and conditions.