What does it mean that "big characters are difficult to be secret, small characters are difficult to be generous and redundant"?

Large characters are difficult to be dense and seamless, and small characters are difficult to be generous and redundant. "It means that the difficulty in writing Chinese characters is that words and children can be closely connected without appearing many gaps. The difficulty in writing about a boy is that he can write widely and with gaps.

Song people discussed the big characters and small characters the most. Su Shi once said: "What is expensive in the world will be expensive, but it will be difficult." ... it's hard to keep the big characters secret, and it's hard to be generous with the small characters. "

Huang Tingjian once expressed his views on Su Shi's ci. He thinks that Dong Fangshuo Portrait Praise, Le Yi and Preface to Lanting Collection are the representatives of fine print, while the artifacts and tadpole-shaped characters in the pre-Qin period, such as Yi Heming, Ode to Zhongxing and Yi, are the representatives of fine print. The same is true of this passage by Su Shi, but Mi Fei has another sentence: "All big characters should be like small characters, and small characters should also be like big characters. Chu Suiliang's fine print was like a big character, which was later handed down by his ancestors, and occasionally there were strange people. Big characters are the same as small characters, I can't see them. " Mifei thinks Chu Suiliang did it, but no one did it.