Nantong Wushan soy sauce can be purchased at local supermarkets, condiment shops or online.

If you can't find it locally, you can also try searching for "Wushan soy sauce" on the local e-commerce platform in Nantong, or ask local residents about purchasing channels.

In addition, if you are in Nantong City, you can also go to major supermarkets in Nantong City, such as RT-Mart, Carrefour, etc., or go to the condiment wholesale market in Nantong City to buy Wushan Soy Sauce.

If you need more information on purchasing channels, you can search for relevant shopping guides in local media or e-commerce platforms in Nantong City or consult local residents.