Zhang Xuan is good at painting turquoise mountains and rivers, and he paints well with ink and ink, without applying colorful colors. His brushwork is completely free from the constraints of formal painting, and his pen is much more ingenious. His experience is: "Nature is made by foreign teachers, and the heart comes from China", aiming at forgetting things and me through "enlightenment". According to today's understanding, it is to look for first-hand information and materials in nature, learn from the real world, and then combine your own thoughts and feelings to perfectly integrate the external natural scenery with the inner world to create a world with both form and spirit. This thought conforms to the fundamental law of artistic creation and is regarded as the standard by later landscape painters.