Zhu Xuan believes that from the etymological point of view, "Zhu Xuan" was originally a philosophical term, which was first published in Zhuangzi Heaven and Earth. According to the description in this article, the Yellow Emperor left "Zhu Xuan" when he went to the north of Chishui and climbed Kunlun Mountain. The Yellow Emperor cherished it very much. He asked Zhi and Li Zhu to look for it, but they couldn't find it. Finally, he sent an elephant to look for it, and finally he found Zhu Xuan back. What exactly is this "Zhu Xuan"? According to Sima Biao, "Zhu Xuan" means "Tao", or "Dao Zhen". Why do you want to get it back? The key is to be sloppy. The word "image without intention" is an allegorical name, and the word "image without intention" means "nothing", so "image without intention" means no image. We lose our image because we are not interested in it. If the mind can enter nothingness, the Tao will be revealed. In Zhuangzi's view, the search for "Zhu Xuan" has a more abstract significance. However, in Taoism, this has become a high-level enlightened realm, which is related to specific health preservation methods.
Ignore Taoist nouns. Refers to the image of nothingness, which is pointed out in the Taoist Danfa that God opens the sky, and the activity of thinking consciousness is relatively static, reaching the realm of forgetting myself. Life is noble: "Those who don't pay attention to image will be forgotten." Zhi Dun in the Jin Dynasty's Poem of Chanting for the Huai Dynasty: "Daohui has more meditation value, but it is not like Zhu Xuan." Again, "Push the roll and relax, forget the attached drawings."