Why is An Yan called the most handsome green card in Korea?

China male singers develop in South Korea. According to An Yan's profile, because of his outstanding appearance and being a China male singer developed in South Korea, his fans gave him a name "Why An Yan is called the most handsome green card in South Korea". In the context of rice circle, green card refers to China-born Aidou who started his career in Korea, but now it generally refers to Aidou who started his career with a non-local nationality.