Questions about calligraphy?

Embroidered with the inscription "The Best Happiness in the World" by Emperor Kangxi. You can Baidu the picture. The word is still in Beijing Gongwangfu. People always touch the blessing when they are sightseeing, so they get the blessing. At that time, when Emperor Kangxi wrote this word, it meant "more blessings, more fields, more children and more clothes", so it was circulated by the world!