Sparse meaning: it is to make the density, danger and weight of font structure change and reflect appropriately. For example, when making apostrophes, the external apostrophe of the word "Lu" is long and sharp, and the internal apostrophe is shorter to avoid duplication. The long apostrophe of the word "fu" has gone down, so we should leave a short apostrophe to make it change. Another example is si. If the pi si of the word "po" is shortened, it is called avoidance. The permanent extension of the word "Chang" is called "Jiu". Another example is a flat hook, in which the hook of the word "pigeon" is taken as avoidance, and the hook of the word "well" is displayed. Also, if the word "every" is drawn from the bottom, then the top must be done a little, which is also to avoid overlap and simplify the path.