Chang'e Picture

Chang'e or Chang'O (Chinese: 嫦娥), originally known as Heng'e, is the Chinese goddes of the moon.

She appears several times in Chinese mythology
, but the most well-known tale about Chang'e is the one regarding the origin of the Mid-autumn Moon Festival, held on the night of the full moon between early September to early October of the Gregorian Calendar. Most versions contain the following elements: Hou Yi, an archer and Chang'e's husband, an evil or benevolent emperor and the moon.

There are many variations of how she became the goddess of the moon, but they are really well explained here.