In PRC discourse, 国际主义 typically refers to 无产阶级国际主义 (proletarian internationalism) — solidarity between workers across nations. Mao's eulogy for the Canadian doctor 白求恩 (Bethune) made 国际主义 a school-textbook value.
usage
Add 者 (zhě) for 'an internationalist' (国际主义者). Pair with 民族主义 (nationalism) as the conventional ideological opposite.
