There was a famous poem called " Climbing High ", which had a famous line of " Green hills outside the mountains and towers outside the towers ". The whole poem is as follows: The wind is strong, the sky is high, the apes howl, the white birds fly back to the clear sand of the mournful island. Endless trees fall and the endless Yangtze River rolls down. I'm always a guest in autumn, sad for thousands of miles. I've been sick for a hundred years, and I'm alone on the stage. I'm in trouble, bitter resentment, frosty hair, downcast hair, I've just stopped drinking. Green mountains beyond the mountains, buildings beyond the buildings, the green mountains are also in the buildings, where is the poet's heart?