Zhao Yin is good at mathematics. According to the relevant public information, Zhao Yin is a master of returnees and a first-class coach of China Mathematical Olympics. Zhao Yin has trained a large number of winners of top math competitions at home and abroad, so Zhao Yin is good at math. Zhao Yin, Master of Science and Education in Returnees. First-class coach of China Mathematical Olympics, 10 years of teaching experience in competitive mathematics. He has taught in Beijing No.4 Middle School, the Experimental School affiliated to Beijing Normal University and Beijing Mathematics Team 2.