When the two words Chon Ji are combined, they take on a different meaning: Lake Chon-Ji is the Heavenly Lake, located in a crater on Paektu-San (White Headed Mountain) located on the border between China and North Korea, which was the first residence of the legendary Dan-Gun before he established his capital at Asadal (now Pyongyang) in 2333 B.C.E. Virtual tour: the Heavenly Lake can be seen on Google Maps here.