The class excluded from the four caste systems: Dapu Rongsu, in popular terms, is India's "untouchable" in reality. They can only engage in the most humble and lowest-level jobs. They are discriminated against, but they can't change their lives.

Indian caste can be divided into four categories: Brahman, Khrushchev, Vedas and sudra. The first three are all higher surnames, while the fourth caste, even farmers, has a much higher slave status than Da Park Yung-soo. Dapu Zhengzhu was discriminated against by society and engaged in the humblest and dirtiest work. Even if they live such a life of serious discrimination and disrespect, the hierarchical concept since ancient times has forced them to accept the reality and be content with the status quo.

Dapu Zhengzhu is called "Dalit". They not only have to endure the unpleasant smell of cleaning toilets and processing leather, but also ring the bell humbly after finishing their work, which means not to be polluted by "me". Even when walking, one's own shadow cannot fall on the four castes.

So can Dapu Rongsu people change their humble social status by marrying other castes? The answer is no, in India, even four castes cannot get married, let alone marry such a humble caste. It will be a shame to marry Ada Park Jung-soo, so Dapark Jung-soo people can only marry people of the same caste all their lives, so their descendants will always be Dapark Jung-soo people, which cannot be changed.

What should their children's education be like? The education of the children of Park Jung-soo people is not taken seriously. Even if they can get an education, they are different from the four castes. They are not qualified to study and play with children of other four castes, and they are discriminated against like their parents.