China has been a country of etiquette since ancient times, paying attention to respecting the elderly and loving the young, this "old" does not only refer to the elderly, but also includes people with high status, compared with their own older people to maintain respect, to maintain respect for people who are above themselves, whether in terms of language or action, they must know how to avoid it, let alone call the name of the elderly, so why is Li Yuan called "Gao zu" by posterity, Zhao Kuangyin can be called "Taizu"?

Ancient emperors ascended the throne is exquisite, after entering the main temple will be recognized by the world, the temple here is the temple, if an emperor for himself to build the temple is destroyed, it represents the era of his rule from now on, the purpose of the temple is: the founding emperor is called the ancestor, the succession of the second emperor of the emperor is collectively called the zong.
For example, it often appears in history: Tang Taizong, Tang Xuanzong, etc., as can be seen from their names, they are not the founding emperors of the Tang Dynasty; however, when it comes to "ancestors", there are also many kinds of names: Gaozu, Taizu, Shizu, saying that one of the most popular figures in history, the history books record that they are also the founding emperors, why is Li Yuan only Tang Gaozu, and Zhao Kuangyin is called Song Taizu by posterity?
In fact, this can be understood through their lives, Zhao Kuangyin was born in a family of officials and eunuchs, but his father's position is very low and the power is very small, according to this development, he is not eligible for the throne, zhao Kuangyin, who started from scratch, relying on his own perseverance, step by step to the current position, there is nothing wrong with calling him Taizu; look at Li Yuan, he himself is in power, he was originally the grandfather of the country to launch an uprising, the starting point is too high, it is completely stained with the light of his father's generation, but he is humble and does not rob the credit He only presented himself as Gao Zu, highlighting Li Yuan's good upbringing, not to mention that he later posthumously named his grandfather Li Hu as Emperor Taizu of the Tang Dynasty.
Yang Jian, the founder of the Great Sui Dynasty, also belonged to this situation, Yang Jian and Li Yuan's father had a fairly good relationship, after marrying the daughter of the Lonely Family, he began to make a steady stride, and became the founding emperor of the Great Sui Dynasty, but he could only think of himself as a high ancestor, and he did not dare to rob the credit of his ancestors, not to say whether the people would jointly impeach him for this, and his own conscience would not be too willing to go.
And what is the difference between the ancestors mentioned earlier? Who are the ancestors in history? The first thing that comes to mind is the ancestor of the Yuan Dynasty, Kublai Khan, who took over the Mongol Empire from his father, pointed the spear directly at the Central Plains, and only after the great victory did he move the dynasty into the Central Plains, and the founding of the country was called Yuan, because his merits were too great, and he was the first emperor to bring Mongolia into the Central Plains, so he could be called the Ancestor of the Yuan Dynasty. In short, in fact, these titles are judged by personal merit, not what you want to be called, which is stipulated, in other words, the higher the title of the emperor, the higher the construction of the country.