People from my dad's generation all wore Jeanswest.
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A phonetic loan of 'Jeanswest': 真(zhen)-维(wei)-斯(si) ≈ 'jean-wes'. The characters 真 (true) and 维 (to sustain) were picked for a quality-feeling impression, not meaning.
Originally an Australian brand (1972), acquired by Hong Kong's Glorious Sun Group in 1990 and relaunched across mainland China. Defined casual jeans culture for late-'90s/early-'00s Chinese teens.