Once in Guo Degang's cross talk, there was a joke about "Commander of the Mongolian Navy", saying that as long as the sea is found, he will take office immediately. When I heard it, I burst out laughing. But later I discovered that we were a little ignorant. In fact, Mongolia, as a landlocked country, does have a navy. In fact, not only Mongolia, but at least 16 other landlocked countries also have naval establishments.