1) English, Chinese, English, to meet different learning needs
2) Eye protection paper, soft luster does not hurt eyes
3) Each book is up to 60 pages long and can be written on both sides
4) The paper thickness is moderate, wipe is not easy to break
5) The cover is waterproof and oil-proof, which is still new after a semester
6) Can be spread 180 degrees flat, easy to write without touching hands
7) Suture binding process, long use without off the page
8) B5 large size, can write more content