During the Qing Dynasty, why did Han officials call themselves ministers and Manchu officials called themselves slaves?

I watched the TV series Ji Xiaolan with iron teeth and copper teeth when I was a child. We all like honest and upright Ji Xiaolan, while flattering Shenyang is a clown, and everyone laughs at him! In the play, unlike Ji Xiaolan, who always obeyed the emperor, Xiao Shenyang always called himself Emperor Qianlong and called himself a slave. Isn't it charming? Originally thought, this title is to highlight the different personalities of loyal and treacherous officials, but after consulting the information, I found that there are many articles in it!

It turns out that slaves and ministers are symbols used by the Qing royal family to distinguish the status of flag ministers and Han ministers! Manchu ministers should be called "slaves" and Han ministers should be called "ministers". Seeing this, do you think the Qing royal family is giving preferential treatment to Chen Han? After all, in our traditional culture in China, slave is a derogatory term! However, the result is the opposite. In the Qing dynasty, Manchu ministers, known as "slaves", had higher status than Han ministers, known as "ministers"! Why is this?

It turns out that slavery has been circulating in Manchu tribal culture. In their consciousness, slaves belong to their masters, and the relationship between slaves and their masters is obviously closer than that between themselves and outsiders. Therefore, the terms "slave" and "minister" actually reflect the close relationship between courtiers and the royal family. A "slave" is a reliable and intimate home secretary, and a "minister" is an untrustworthy foreign minister. Therefore, in the TV series, Xiao Shenyang claims to be a slave, which is actually a show-off attitude towards Chen Han and Ji Xiaolan!

In short, under the cultural and political system of the Qing Dynasty, being a slave of the royal family is more advanced than being a servant of the royal family! If Chen Han wants to call himself a slave and change his identity, he has no choice but to join the Eight Banners of the Han Army or become a slave voluntarily.