AliExpress is just a directory, it's not a single supplier, there are lots of different suppliers on there. You just have to make sure that you are using a dropship supplier if you want blind shipping. So always ask the supplier if they drop ship or blind ship if you're not 100% sure.
Dropshipping and blind shipping are essentially the same thing, with one major difference. Where a drsopshipper sends direct to your customer without an invoice as standard practice. Wholesalers/retailers who do not offer dropshiping, but in fact offer blind shipping, means that they send the order to your customer with the invoice (unless they agree to not to), but it will have their name on it, with only the price blanked out.
Blind shipping is most commonly used by retailers when buying from wholesalers. So for example, it a product is out of stock and the retailer has that on back order for a customer, then they can ask the wholesaler to send that direct to their customer as soon as it arrives back in stock to save time. So the wholesaler will then just blank out the wholesale price on the invoice and send direct to the retailer's customer.
In this situation it doesn't matter that the suppliers name is on the invoice because they are a wholesale supplier and the retailer's customer wouldn't be able to buy direct from them anyway, so long as they weren't a registered business and open their own account. The important thing is that the wholesale price is blanked out so the retailer's customer can't see the margin they have made on the sale.
So remember, dropshipping is zero invoice to your customer. Blind shipping is invoice, but limited sensitive information provided as standard practice.