- 社会民主党 shèhuìmínzhǔdǎng Social Democratic PartySocial Democratic Party; an umbrella term for various political parties worldwide that follow social democratic socialism
- 社会民主主义 shèhuìmínzhǔzhǔyì social democracyA political ideology that advocates for social justice within the framework of a liberal-democratic polity and a capitalist-oriented mixed economy