The title of the year is used by the feudal dynasty of China to record the year. Generally initiated by the emperor. There was no title from the pre-Qin Dynasty to the early Han Dynasty, which was first created by Emperor Wu of the Han Dynasty after he ascended the throne. The founding year is Jianyuan. Since then, a system has been formed. Emperors of past dynasties generally changed their titles when they encountered great events and important events such as "good fortune from heaven" or internal troubles and foreign invasion. An emperor uses one to a dozen titles.
The title originated when the new monarch of ancient China ascended the throne. In order to distinguish the former monarch, the new monarch recalculated the system of reigning years. Emperor Wu of the Western Han Dynasty ascended the throne and added a commemorative name before the year number, which was the beginning of China's ancient appellation. According to the textual research of Zhao Yi's Notes on Twenty-two Histories in Qing Dynasty, the year number was first created in the 19th year of Emperor Wu of Han Dynasty, and the year number was "Jianyuan" (140- 135).
The subject is expected to write a travel note. I have the following suggestions on the choice of country names:
1. Ancient people were very particular about choosing a country name, and they were usually named after the territory or title originally occupied by the founding monarch. For example, when Liu Bang sealed Hanzhong, Han was the country name, and when Li Yuan sealed Tang Gong, Tang was the country name. Therefore, in which area is the site originally written by the subject, it can be named as the country name.
2. From the Yuan Dynasty, you can also choose auspicious and atmospheric words in ancient books, which are available in Yuan, Ming and Qing Dynasties. My suggested words are: Switzerland, Gansu, Zhuang, Xuan and other atmospheric words as country names.