Of course not. Xunzi (about 313-238 BC), whose name is Qing, is of the Han nationality. He was also called Sun Qing because he avoided the taboo of Liu Xun, the Xuandi of the Western Han Dynasty, and because the two words "Xun" and "Sun" have the same ancient sound. At the end of Zhou Dynasty and Warring States Period, Zhao people. A famous thinker, writer, politician, and one of the representatives of Confucianism, he was honored as "Xun Qing". He went out to Jixia Xuegong in the State of Qi for three times, and was later ordered by Chu Lanling (now Shandong Lanling). Xunzi developed Confucianism and advocated the theory of evil nature, which is often compared with Mencius' theory of good nature. It has also made considerable contributions to the reorganization of Confucian classics.
Yan Zhenqing (79-784, Yi Shuo 79-785), whose name is Qing Chen, was born in Wannian (now Xi 'an, Shaanxi Province) of Tang Jingzhao, and his ancestral home was Linyi (now Linyi, Shandong Province) of Tang Dynasty, China. Outstanding calligrapher in the mid-Tang Dynasty. His "Yan Ti" regular script, together with Zhao Mengfu, Liu Gongquan and Ou Yangxun, is also called "the four masters of regular script". And Liu Gongquan are also called "Yan Jin Liu Gu".
in a word, two people have nothing to do with each other.