It is easy to learn about cutting a piece of paper but very difficult to master it with perfection.Beginners need only a knife and paper.For craftsmen，they need knives and gravers of various types to make complicated(复杂的) patterns.For complicated patterns，people first paste the pattern on the paper and then use various kinds of knives to make it.No mistake can be made during the process otherwise the work would fail. Paper-cutting covers nearly all topics，from flowers，birds，animals，legendary people，figures in classic novels，to types of facial make-up in Beijing Opera.Paper-cutting has various styles in different parts of China.