Why does Li Bai like to write poems about mountains?

According to legend, Li Bai, a great poet in ancient China, drifted with the wind to a sea fairy mountain when he was sleepy one night. I saw a vast sea of clouds, surrounded by lush flowers and trees. Li Bai was intoxicated by the beauty of nature. Just then, a huge brush rose from the sea of clouds, more than ten feet high, like a jade pillar. Li Bai thought to himself, "How wonderful it would be to get this giant pen, with the earth as the inkstone, the sea water as the ink, and the blue sky as the paper."

Just as he was thinking, he suddenly heard a melodious Yue Xian. Five colors of light came out of the pen tip, and then the pen tip opened a bright red flower. The flower pen gradually moved and floated towards him. Li Bai saw the colorful pen of Hua getting closer and closer, so he reached for it. He was awakened when he was about to touch the thick pen. It was a dream.

After Li Bai woke up from his dream, he repeatedly recalled the scene in the dream and couldn't figure out where it was. He is determined to visit famous mountains and rivers and find the fairyland of his dreams. Later, Li Bai-yun swam to Huangshan Mountain, saw this flower-planting pen, and suddenly shouted, "The flower-planting pen I saw in my dream is here."

According to legend, since Li Bai saw "dream pen gives birth to flowers", famous sentences have been pouring out.