Who are the Real Ge Xuan and Ge Hong? 

Information is taken from the Records of the Three Kingdoms and the following sources.
References
Davis, R. Michael; Sommer, Robert; Menge, John A. (2012). Field Guide to Mushrooms of Western North America.
"The Botanist". Archived from the original on 2017-04-27.
Xuan, Ge. "The Classic of Purity." The Classic of Purity.
Crowley, Aleister (2011). Demian, Max (ed.). The Qingjing Jing of Ge Xuan, "The Classic of Purity": A Poetic Paraphrase by Aleister Crowley based on the translation of James Legge.
Sheng, Jiang. "Ge Xuan (Immortal Elder Ge)." Taoist Culture and Information Centre.
Robinet, Isabelle (1997). Taoism: The Growth of a Religion.
Kohn, Livia (2004). The Daoist Monastic Manual.
Kohn, Livia (1993). The Taoist Experience: An Anthology.
Kohn, Livia (2000). Daoism Handbook.
Doniger, Wendy (1999). Merriam-Webster's Encyclopedia of World Religions: An A-Z Guide to the World's Religions.
Campany, Robert Ford (2005). "Two Religious Thinkers of the Early Eastern Jin: Gan Bao and Ge Hong in Multiple Contexts".
Campany, Robert Ford (2002). To Live as Long as Heaven and Earth: A Translation and Study of Ge Hong's Traditions of Divine Transcendents.
Bokenkamp, Stephen (2008). "Ge Xuan". In Pregadio, Fabrizio (ed.). The Encyclopedia of Taoism.
Image of Zhuang Zi/ Zhuang Zhou By Hua Zili (華祖立) - m.yac8.com/news/12817_10.html, Public Domain, commons.wikimedia.org/w/index...
A diagram illustrating the concept of taiji, called a taijitu. By Johannes Rössel - Own work based on: Hotu.png, Public Domain, commons.wikimedia.org/w/index...
Wheel of Dharma symbol By Shazz, Esteban.barahona - Own work, CC BY-SA 3.0, commons.wikimedia.org/w/index...

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