One day when some government officials were rebuilding a barn, they found a mousehole in a corner and used smoke to force the mice inside the hole to come out. A whilelater they really saw mice running out, one after another. Then, everyone thought thatall the mice had escaped. But just as they began to clean up, they saw two mice squeezingout at the mouth of the hole. With some efforts, the mice finally got out. However, itwas strange that after they came out of the hole, they did not run away immediately. Instead, one chased after the other near the mouth of the hole. It seemed that one was trying to bite the tail of the other.