Shànghǎi shì dìyī ge qiángzhì zhíxíng lājī fēnlèi de chéngshì, yǒuhài lājī zhuānmén huíshōu.
Shanghai was the first city to enforce waste sorting, with hazardous waste collected separately.
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One of the four bins introduced by Shanghai's landmark 2019 waste-sorting rule: 可回收物 (recyclable), 有害垃圾 (hazardous), 湿垃圾 (wet / food waste), 干垃圾 (dry / residual). The system has since rolled out to most major Chinese cities.