Racial quota

Racial quotas in employment and education are numerical requirements for hiring, promoting, admitting and/or graduating members of a particular racial group. Racial quotas are often established as means of diminishing racial discrimination, addressing under-representation and evident racism against those racial groups or, the opposite, against the disadvantaged majority group (see numerus clausus or bhumiputra systems).

It has been argued that such quotas are a form of racial discrimination.

These quotas may be determined by governmental authority and backed by governmental sanctions. When the total number of jobs or enrollment slots is fixed, this proportion may get translated to a specific number.

The Mongols divided different races into a four-class caste system during the Yuan dynasty.

The Mongol Emperor Kublai Khan had introduced a hierarchy of reliability by dividing the population of the Yuan Dynasty into the following classes:

Several laws enforcing racial segregation of foreigners were passed during the Tang Dynasty. In 779 AD, Tang dynasty issued an Edict which forced Uighurs to wear their ethnic dress, and restricted them from marrying Chinese.

In 836 AD Lu Chun was appointed as governor of Canton, he was disgusted to find Chinese living with foreigners and intermarriage. Lu enforced separation, banning interracial marriages, and restricting foreigners to own properties. The 836 law specifically banned Chinese from forming relationships with "Dark peoples" or "People of colour", terms referring to foreigners, such as "Iranians, Sogdians, Arabs, Indians, Malays, Sumatrans", etc.

...
Wikipedia