To upload different specifications of the same product, you can add specification options in the product information and provide corresponding detailed information for each specification option. You can use attribute fields to distinguish different specifications, such as size, color, capacity, etc. When uploading, make sure that each specification option has a separate SKU (stock keeping unit) to properly track inventory and sales.

In addition, you can use pictures and descriptions to show the characteristics and differences of each specification option so that customers can clearly understand the difference between different specifications.