In the begining Yin and Yang caused Chaos in the egg. they were male and female, hot and cold, dark or light or cold and warm
The egg burst opens as the dragon Pan-gu comes out as yin ang yang pushed the shell parts apart thus the earth was created and they began to do the work
Every 18000 years Pan-gu grows 10 feet thus the sky goes higher and after 30,000 miles grown he went to work on the mountains and the lands thus the world is born. after he did all the work he rested and is still resting till this day.