Breathe evenly, the meridians will be or have been unobstructed, and self-absence and self-absence are good places for meditation, which is of great benefit.
If you can't breathe evenly, it's useless;
If there is no performance of qi and blood running, it is useless to just wait and die;
If we can't cope with the changes in the environment well, we will often be frightened and become useless.