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
Tsaidam or Qaidam basin (Mongolian: salt marsh), depression northeast of the Plateau of Tibet, located between the Qilian Shan and the Kunlun Shan at the northern margin of the Tibetan Plateau.