Gan Kun's explanation is as follows:
1, sweet melon and kungua in Iraq.
"Under the Book of Changes": "The Yellow Emperor Yao Shun draped his clothes and ruled the world, covering all Gansu and Kunming."
Dai Zhong: Yuan in Spring and Autumn Annals, Guan Ju in Poetry, Guan Yu in Book of Rites and Gan in Book of Changes are all cautious people.
Ming Hekai Book of Changes Volume I: "The Book of Changes began with Gan and Kun."
2, the name is heaven and earth.
Yi Shuo Gua: "Make for the sky ... Kun is the land."
Korean classic quotation: "Jing Wei Gan Kun, in and out of the three lights."
"Confucius' Family Words": "There are 300 insects and 60 people, which is beautiful. "
Jin Yuanhao asked the third song of "After the Collection of Central China": "The ancient poets spit their lungs and livers, and it is difficult to get rid of their qi."
Qing Pu Songling's Strange Tales from a Lonely Studio: "Who is fierce and stubborn?"
3, the name is Sun and Moon.
Tang Du Fu's poem "Climbing Yueyang Tower" reads: "There is Wu in the east and Chu in the south, and we can see the endless drifting of heaven and earth."