With statistics and analysis,documents about swordplay published recently are analyzed,and the results show that the kinds of swordplay are in disorder without scientific criteria,which barricade its development as well as spread.

For the maximum entropy Cambridge algorithm the method is put forward that the usual ball-bound can be replaced by cuboid-bound, the question of equation of the two bound conditions when L 0→0 is discussed, the obvious superiority of the cuboid-bound condition to ball-bound is explained.

The paper compared the related historical material and realistic situation on the swordplay between China and Japanese and proposed that Chinese swordplay emphasize performing arts,while the Japanese swordplay empha- size the combating resistance and the deference is due to the different history and custom.