Shen Lian was listening to the legend, which was also the origin of this world. According to 'mother', there were only spirits in this world and not human beings.
Later, a sun appeared in the sky. The world welcomed its first batch of inhabitants. These inhabitants - the First Men came from a place that had a sun too. From then onwards, the number of spirits declined.
First men were mortal, and they faced death too. However, the stronger ones became the stars after they died. Some stronger spirits too had turned into stars in the sky.
There was a star called the moon. It engulfed the light of other stars and became the brightest star in the night sky.
Then, the moon made a promise with the rest of the stars. In order to not be in the way of their light, the moon promised to only shine to its heart's content only once in every thirty days. That day was known as 'full moon'.
The number of stars in the sky increased, and the moon too remained strong.