‘汤汤’ (shāng shāng) is a reduplicated adverb describing water flowing rapidly and noisily—like a rushing river or turbulent stream. Though both characters are written as 汤, this is a special literary pronunciation distinct from the common word for 'soup' (tāng). The repetition emphasizes intensity and continuity, evoking both sound and motion. It appears almost exclusively in classical or poetic contexts, especially when depicting natural scenery such as rivers, waterfalls, or seasonal floods.

This term carries a formal, elevated register and is rarely used in everyday speech or modern casual writing. It often appears in idioms, historical texts, or descriptive passages in literature and travel writing about majestic landscapes. Because it’s homographic with the common noun tāng (soup), learners must pay close attention to tone marks and context to avoid confusion—it never means 'soup' here, nor does it refer to temperature or food.