There are two methods to change supplier to BestDealer after the product is sourced.
If you ask for quote in "Your Live Products" or "Awaiting Order", simply click the "Switch Supplier" button to change the supplier to BestDealer(1688).
If you source the product from other channels, go to "Your Live Products" to find the existed product and map it to BestDealer supplier.
Copy the BestDealer URL Link and click "import". Then save the data!