When AliExpress returns “System error”, in most cases the product is out of stock. Please follow the steps below to change a supplier.
(If you already have an AliExpress product link, please skip this step.)
To find a supplier on AliExpresss, please go to AliExpress dropshipping center( https://home.aliexpress.com/dropshipper/join_drop_shipper.htm) > Find Products to Sell
Click "Search by image" and find similar products by uploading a product image.
For more details about AliExpress Dropshipping Center
Of course, you can also find similar products through the product title on AliExpress.
Adding a mapping/bundle product is like adding a product via a link. Add a product group and these products can be mapped to your Shopify products.