This book introduces science and technologies in ancient China, including the compass, gunpowder, movable-type printing and papermaking. It is written for extracurricular reading to help primary school students gain some basic knowledge of science and technologies in ancient China and enhance their interest in the area. Excellent traditional culture should be seen in museums and cultural works and be reflected in the words and actions of ordinary people (including children). Only education can connect traditional culture with real life and revive traditional culture. The resurrected traditional culture has vitality and is eligible for inheritance and innovation.