The most common method used by the ancients to distinguish dynasties was "naming". The so-called "naming" method is to add a prefix before the country number to show the difference. They usually name dynasties in chronological order and geographical location. The most common method is to say "before and after" in chronological order and "east, west, north and south" in geographical position. This is the most concise and clear method to distinguish, and it is also the most commonly used method by historians today, such as the Western Zhou Dynasty, the Eastern Zhou Dynasty, the Northern Song Dynasty and the Southern Song Dynasty.
Sometimes, the ancients used the country name combined with the five elements of good and bad luck to name it. Although it is rare, it is a distinctive naming method. The Han Dynasty was called "Han Yan" because it respected the morality of fire. This is because the Han Dynasty was greatly influenced by the theory of Yin and Yang. Although the Song Dynasty academically denied the "transfer of five virtues", with the decline of the national situation, it still had to rely on the theory of five games as much as possible, so the Southern Song Dynasty (founded by Liang Wudi) and the Song Dynasty (founded by) were also called "Water Song" and "Fire Song" respectively.
Characteristics of Song Dynasty's Imprint
One of the characteristics of the official seal in Song Dynasty is the simplification of materials. In the Song Dynasty, except for the Jade Seal and Jin Xi, other official seals were basically made of copper, and making seals with jade became the patent of emperors. The imperial treasures of the Emperor of the Song Dynasty are mainly jade, with less gold. There are three kinds of gold seals made in Song Taizu, namely "universal seal", "imperial seal" and "imperial seal". When Song Taizong turned it into a treasure, it was still gold.
In other dynasties, only Song Zhenzong's "treasure of the same language in the world" was made of gold, and the others were jade treasures. During the Southern Song Dynasty, Song Gaozong made 1 1 pieces of jade, and only three pieces of gold were cast. Empress, Empress Dowager, Empress Dowager and Crown Prince's treasures are all made of gold. Only Empress Liu and Empress Gao have heard of politics, and their "Cixi Bao" and "Cixi Bao" are all made of jade.