Tidy up the throne of Dahan
Han Taizu Liu Bang, Han Liu Ying, Han Shaodi, Han Shaodi Likas, Han Heng, Han Jingdi Liu Qi, Han Wudi, Han, Han Feidi Liu He, Han Liu Xun, Han Yuandi Liu Ao, Han Chengdi Liu Ao, Han Aidi Liu Xin, Han Pingdi Liu Li, Han Confucian Liu Ying and Han Xuandi Liu Ying.
Qinghe Xiaoqing, Xiao Andi, Hou Xiangqian Shaodi, Xiao Bao, Xiao Liu Bing, Xiao Di, He Jian Xiaokai, Wu Li Liu Hou Yi, Xiao Di Herry Liu, Liu Shu, Liu Chang, Liu Hong, Liu Bian, Liu Xie.
The Han Dynasty (206-220 BC) was a unified dynasty after the Qin Dynasty, which was divided into two periods: the Western Han Dynasty and the Eastern Han Dynasty. Among them, the Western Han Dynasty experienced thirteen emperors, which lasted 2 14 years. Fourteen emperors spread in the Eastern Han Dynasty, which lasted 195 years. The Han Dynasty was the most advanced civilization and powerful empire in the world at that time. Since the Han Dynasty, the Huaxia nationality has gradually been called the Han nationality.
Important inventions of Han dynasty:
1, papermaking
In the Western Han Dynasty, silk floss and hemp were used to make paper, which was the ancestor of paper. Cai Lun improved papermaking in the Eastern Han Dynasty and formed modern paper. Papermaking has become one of the four great inventions in China.
2. Astronomy
In the Eastern Han Dynasty, Zhang Heng made the world's first seismograph that could predict earthquakes. Taichu calendar, written by Luo and others, brought the 24 solar terms into the calendar for the first time.
3. Medicine
Zhang Zhongjing was honored as a "medical sage" because of Treatise on Febrile Diseases, the originator of traditional Chinese medicine. Hua Tuo was the first doctor in the world to adopt general anesthesia. In addition, blood circulation was first discovered at this time.
4. Mathematics
Weekly Parallel Computing in BC 1 century and Nine Chapters Arithmetic in the early Eastern Han Dynasty are masterpieces in the field of mathematics. Among them, Nine Chapters Arithmetic is a summary of the development of mathematics in the period of the establishment and consolidation of ancient society in the Warring States, Qin and Han Dynasties.
Baidu Encyclopedia-Han Dynasty