How to make Mouding fermented tofu?

The fermented bean curd, also called fermented tofu, is a traditional appetizer in Chinese cuisine.

Mouding county, west Yunnan’s Chuxiong Yi Autonomous Prefecture, specializes in making the fermented tofu that had gained popularity in the province.

What’s the ingredient? How is it made? Let’s watch the video and find out!
 
Source: Xinhua; Trans-editing by Mo Yingyi