What do you mean by special ink spots?

A brand about calligraphy. Ink spot is a brand, the special meaning of ink spot is a brand related to calligraphy, and copybooks are used to copy words. Generally speaking, calligraphy with ink dots is considered as cursive script, such as Preface to Lanting by Wang Xizhi and Sacrifice to My Nephew by Yan Zhenqing, which is the first and second running script in the world.