In the Han Dynasty, the emperor's sons and the emperor's brothers were the same in title, basically all princes, after all, the emperor's brothers were also the emperor's sons, but after the crown prince succeeded to the throne, they changed from the emperor's sons to the emperor's brothers. (This one is a bit around)
So do the princes need to perform a ritual when they see an uncle with the same title? The answer is that it is necessary to perform rituals, especially when meeting in private, the prince is a nephew in front of the emperor' uncle, and the nephew has no reason to see his uncle. And don't say it's an ordinary prince, even if the crown prince sees his uncle, he has to perform a family salute.
For example, in the early years of the Ming Dynasty, after the death of the crown prince Zhu Biao, Zhu Yuanzhang made Zhu Biao's eldest son Zhu Yunjiao the emperor's grandson, and Zhu Yuanzhang reformulated the imperial etiquette for this purpose.
In the twenty-ninth year of the Ming History :(Hongwu), the ceremony of the kings seeing the Eastern Palace (Zhu Yunjiao) was re-established, and after the pilgrimage, they performed family ceremonies in the inner temple, and all the kings were honored
That is to say, although Zhu Yunjiao is the grandson of the Emperor, he still needs to perform family etiquette to his uncles in private, and the uncles are still the elders of Zhu Yunjiao.
(Zhu Yunjiao in "Daming Fenghua", because he became the emperor's grandson as a junior, so Zhu Yuanzhang specially modified the royal etiquette for him, and during his tenure as the emperor's grandson, he also had to perform family ceremonies when he saw his uncles on weekdays))
In fact, it is not only the prince who sees the elders to perform the ceremony, the emperor must still be humble when he sees the elders in private, for example, When Ming Yingzong saw his uncle prince in private, he was polite, exempted from kneeling and performing the ceremony, and also invited to the seat.
(Ming Yingzong in "The Style of Daming")
In the early years of the Han Dynasty, Liu Ying, the eldest son of Liu Bang, the ancestor of Han Gaozu, was made crown prince, and after Liu Bang's death, Liu Ying succeeded him as Emperor Hui of Han and became the second emperor of the Western Han Dynasty.
Liu Ying's mother was Liu Bang's empress Lü Yan, who inherited the throne as the eldest son, but he was not the eldest son, Liu Ying also had an eldest brother Liu Fei in front of him, Liu Fei's mother Cao Shi was a lover of Liu Bang long ago, Liu Bang often met with Cao Shi before marriage, and then Left Liu Fei. Later, when Liu Bei seized the throne, Liu Fei became the eldest son of Shu and was enfeoffed with the State of Qi, the largest princely state in the early Han Dynasty.
In the second year of Emperor Hui of Han, Liu Fei entered the capital to meet Emperor Hui of Han, and Emperor Hui of Han left Liu Fei to drink in the harem. Since it was a family banquet, Emperor Hui of Han treated Liu Fei as a brother, honored Liu Fei as a brother, and invited him to sit on the upper seat.
(Emperor Hui of Han was still very benevolent and was good to his brothers and brothers)
However, Emperor Hui's move caused dissatisfaction with Lü Hou, who prepared to kill Liu Fei on the spot. Lü Hou immediately secretly ordered someone to bring two glasses of poisonous wine in front of Liu Fei and ask Liu Fei to toast for her. Liu Fei did not know the conspiracy, so he raised his wine glass and prepared to get up to toast. However, at this time, Emperor Hui of Han, who did not know the inside story, also picked up another cup of poisonous wine and prepared to toast to his mother with Liu Fei. When Lü Hou saw that things were not good, he hurriedly overturned Emperor Hui's wine glass, while Liu Fei was suspicious and frightened, and quickly found an excuse to jump.
In general, the emperor is also a person, there are also seven aunts and eight aunts, and it is also polite to see the elders and brothers in private, after all, everyone is a family!
Of course, this is all a private greeting, in the formal occasions, the imperial family is still in line according to the level of the title and the blood relationship with the current emperor, everyone has to kowtow to the emperor, but also need to perform the courtesy to the prince. As for the princes, the status of both uncles and nephews is the same, but since the titles are the same, they still have to be saluted by the younger generations.