The Mid Autumn Festival in October 4, 2017, the sky is clear. It is very good for the moon. The Mid Autumn Festival, the Mid Autumn Festival to the full moon, with the name of the first chapter appeared in the Tang Dynasty in Song Dynasty, of which the most famous is Su Shi`s `Yang Guan Qu, the Mid Autumn Festival`, also known as `Yang Guan Qu, QingHan overflow` to muyun.