Title: Li dai ming jia ping zhu shi ji ji shuo
Subjects: History
Places: China
People: Yuqing Cheng, Qian Sima (approximately 145 B.C.-approximately 86 B.C)
Time periods: To 221 B.C., Qin dynasty, 221-207 B.C., Han dynasty, 202 B.C.-220 A.D.