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1840 in China 
Summary
Events from the year 1840 in China.
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| See also: | Other events of 1840 History of China • Timeline • Years | ||||
Incumbents edit
- Daoguang Emperor (20th year)[1]
Viceroys edit
- Viceroy of Zhili — Qishan then Nergingge
- Viceroy of Min-Zhe — Deng Tingzhen then Yan Botao
- Viceroy of Huguang — Yutai
- Viceroy of Shaan-Gan — Hūsungge then Nergingge then Hūsungge then Enteheng'e
- Viceroy of Liangguang — Deng Tingzhen then Lin Zexu then Yiliang then Qishan
- Viceroy of Yun-Gui — Guiliang
- Viceroy of Sichuan — Gioro-Baoxing
- Viceroy of Liangjiang — Chen Luan then Deng Tingzhen then IIibu