The items on 1688 are relatively cheap. There is a saying that you sell on Taobao and buy on 1688. There are a lot of direct suppliers on 1688, but there are also trading companies. You need to identify them yourself. Another thing is that the single purchase price of 1688 products is generally not low. If you want to buy at a low price, you need to enjoy different prices according to the quantity required by the merchant.

As for quality, you get what you pay for. If you are not sure, you can ask them to send you samples. Most merchants support sending samples. You just need to pay the postage. You need to negotiate with the seller yourself