主题：我写的关于铁问题的research paper，请大家批评指正 -- 鸭绿江

Iron is one of the most important natural resources used by human beings. Not only because of its usefulness, but only also its abundance in nature. Although the history of people using iron can be traced back to as early as 3000 BC, the Iron Ages (check, Iron Age?) did not begin until about 1200 B.C. Different regions entered the Iron Age at different times. Comparing with their west counterparts, people in ancient China area had a late start . The history of iron using in China is generally ignored in historian discussions, and there are a few comprehensive studies of its history in ancient China. In fact, the iron producing techniques used by ancient Chinese were more advanced than Western World. Not long after ancient Chinese began to use the iron, had the iron become more commonly used in China than in west. In the paper, I will explain that ancient Chinese had technical advantages in using iron, and the usage of iron was popularized faster in China than in the rest of the world.