There are several opinions.
The word "Yong" can reveal a person's calligraphy skills. Because Yongzai contains the basic strokes of Chinese characters such as dot, horizontal, vertical, and strokes, and fold and hook.
But the most difficult words to write are Feng Fei, Feng Qi Jia, etc., so there is a saying in the calligraphy circle, "If you write Feng Fei Jia well, you dare to praise it in front of others." Another version is "Write Feng Fei Jia well, and dare to praise it in front of others." Good Feifeng family, travel all over the world."