Bi Sheng invented the movable type printingin Song Dynasty.
宋朝的毕昇发明了活字印刷术。
2
It is about 400 years earlier than the printingin Germany.
它比德国的印刷术早了大约400年。
3
China has also taken steps to protect the students' eyesight, such as larger printingin students' textbooks, at least two hours' outdoor activities a day, regular eyesight checking, less time on E-books and so on.