俄罗斯 (Éluósī) is the transliteration of 'Russia' (via Mongolian Oros, which is why it begins with 俄 É- rather than R-). Add 人 (rén, person) for the nationality. Same pattern as 美国人 (American) and 日本人 (Japanese).
culture
Russians are also one of China's officially recognised 56 ethnic groups (俄罗斯族), with communities in Heilongjiang, Inner Mongolia, and Xinjiang descended from 19th- and 20th-century migrants.
