According to Chinese mythology, the earth once had 10 suns circling over it. One day, all 10 suns appeared together, scorching the earth with their heat. The earth was saved when a strong archer, Hou Yi, succeeded in shooting down 9 of the suns. Yi stole the elixir of life to save the people from his tyrannical rule, but his wife, Chang-E drank it. Thus started the legend of the lady in the moon to whom young Chinese girls would pray at the Mid-Autumn Festival.

The round shape of moon cakes just symbolizes not only the moon but also the unity of the family.
The most important thing is looking at the moon.On that day, the moon looks brighter and rounder. We call this moon the full moon.