Han Yu
A prominent Tang Confucian, Han Yu, wrote in his essay "Yuan Dao", "When Confucius wrote the "Chunqiu", he said that if the feudal lords use the Yi ritual, then they should be called Yi. If they use Chinese rituals, then they should be called Chinese." Han Yu went on to lament that the Chinese of his time might all become Yi because the Tang court wanted to put Yi laws above the teachings of the former kings, creating the possibility that although insiders could lose their culture, outsiders could similarly gain insider culture.