The echoing relationship of calligraphy should refer to the coherent relationship between strokes and between the two words. In the process of writing a word, the trajectory of the previous stroke points to the starting point of the next stroke. The same is true between two words. So as to form a natural and smooth echo relationship. It seems to be a real feeling.
This is only for running script and cursive script, regular script and official script, and there is no such problem.