南沟以揭露日本军国主义以煤养战，以人换煤的阴谋为主题，北沟以激励国人铭记国耻，复兴中华的决心为主旨。
The south part exposes the intrigue of Japanese militarism that " barter men for coal and coal support war ", and the north part inspirits countrymen to " Always Remember the National Humiliation , Rejuvenate the Chinese Nation " .
养战