Liu Bang established the powerful Han Dynasty in 206 B.C. During the Han Dynasty, agriculture, handicrafts and commerce flourished, and the population reached 50 million. During his reign (140-87 ...
Earliest records show a spoon shaped compass made of lodestone or magnetite ore, referred to as a "South-pointer" dating back to sometime during the Han Dynasty (2nd century ... to determine the best ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback