Nantong Wu Shan soy sauce can be bought in local supermarkets, condiment shops or online. If you can't find it locally, you can also try to search for "Wu Shan Soy Sauce" on Nantong's local e-commerce platform, or ask local residents about the purchase channels.

In addition, if you are in Nantong, you can also go to the major supermarkets in Nantong, such as RT Mart and Carrefour, or go to the condiment wholesale market in Nantong to buy Wu Shan soy sauce.

If you need to know more about purchasing channels, you can search for relevant shopping guides or consult local residents in Nantong local media or e-commerce platform.