It makes sense to eat grass roots and bark, but of course it is impossible to eat them all at once. Eat when you should.

During the Red Army's Long March, because there was no supply from the rear, they basically ate everywhere they went and bought them locally. For example, rice is eaten in the southern region, and highland barley is eaten in Tibetan areas of Sichuan; Occasionally, good conditions can also improve food, such as eating ham and drinking Maotai in Zunyi.

Eat grass roots, bark, cowhide and the like. It was when we crossed the grass, and the conditions were difficult. When we ran out of food, we had to eat these things.