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Jyutping sei3 daai6 pun4 dei6
Pinyin sì dà pén dì

Definitions (CC-CEDICT)
  1. four great basin depressions of China, namely: Tarim 塔里木盆地 in south Xinjiang, Jungar 準葛爾盆地|准葛尔盆地 and Tsaidam or Qaidam 柴達木盆地|柴达木盆地 in north Xinjiang Sichuan 四川盆地