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Jyutping tung4 zi6
Pinyin tóng zhì

Definitions (CC-CEDICT)
  1. reign name of Qing emperor (1861-1875)
Definitions (Wiktionary)
  1. name, historical
    the Tongzhi Emperor (the ninth emperor of the Qing dynasty)
  2. name, historical
    the Tongzhi era (a Chinese era name; the era of that emperor's reign, from 1862 to 1875)