1, the hair of hairy tofu is generally white, called Mucor. Long yellow hair depends on the specific shape, because the temperature is relatively high now, so the skin color of tofu will turn yellow in a few days, and it looks a bit like light yellow in a room with poor light.

2. Some tofu hairs really don't look like pure white, because Mao Mao is very shallow. The top spore is also light in color and looks a little yellow.

3, it may be the problem of beans or sour soup. Maybe the beans are moldy or the sour soup has mold, which was not killed when it was processed, so it grows out now and the mold multiplies very quickly. It's the rainy season. If there are other moldy or rotten things in the place where tofu is made, it is easy to make tofu grow into a mold. If it's Aspergillus or something, it's toxic, carcinogenic and difficult to handle.

Because you don't have that picture, you can't see what it looks like, so it's difficult to judge. Of course, it is difficult to distinguish mold only by appearance.

You'd better take some photos. 1 One photo was taken from above, one from a parallel line of sight and the other from a low angle, so as to get a clear picture of Mao Mao and tofu.