How to write birthday couplets for my father-in-law

Your wife is a granddaughter, and you are Sun Xu. Write Grandpa on your head and sign it as Sun Xu's granddaughter.

In the traditional custom of Ghost Festival in the mid-Yuan Dynasty, China people hoped that their ancestors would come back from Du Feng on this day and "eat fireworks again". But "this fireworks is not the other fireworks", which is specially prepared for the younger generation and ancestors, and contains the meaning of filial piety.

Mid-Autumn Festival is the 15th day of the seventh lunar month, and it is also one of the traditional ghost festivals in China. The Central Plains is also one of eight important festivals (Shangyuan (Lantern Festival), Qingming, Long Summer, Dragon Boat Festival, Central Plains, Mid-Autumn Festival, Winter Solstice and New Year's Eve).

Zhongyuan, Shangyuan and Xiayuan are collectively called "ternary". Shangyuan is the 15th day of the first month (Lantern Festival), Zhongyuan is the 15th day of July (Zhongyuan Festival), and Xia Yuan is the 15th day of October.