1, you can go to the local wholesale market of bean products and accessories, which are generally available there.

2. Generally, there are also those who send soybeans.

3. It is also sold in the online mall.

4. You can search for brine manufacturers online and contact directly to buy.

I hope my answer is helpful to you! Suggestion: The price of brine is related to the quality of brine. It is suggested to choose formal channels to buy qualified brine products, which can ensure the quality of tofu and food safety!