Hi, every one: I am Dell . I am a boy studing in No13 middle school. I am only 14 years old. I am the only child in my am very happy to tell you my hobbies and my interest
The Northern Song Dynasty Renzong Kei year to eight years, namely the 1041 - 1048 years, a man named Bi Sheng invented the movable type printing ordinary workers. According to the record of Shen Kuo