title: Lake Huangqi
text: # Lake Huangqi
  
  Lake Huangqi, also known by its Chinese name as the Huangqi Hai, is a lake in Chahar Right Front Banner, Ulanqab Prefecture, Inner Mongolia, China.
  
  ## Name
  
  The present name dates to the Qing, when it was named after one of the Eight Banners.
  
  ## Geography
  
  Lake Huangqi is a lake in Chahar Right Front Banner, Ulanqab Prefecture, Inner Mongolia, China. It forms an irregular inverted triangle of about 110–113 $km^2$ (42–44 sq mi), with an east–west distance of about 20 kilometers (12 mi) and a north–south distance of about 9 kilometers (6 mi). Having an average depth of 4–10 meters (13–33 ft) and a maximal depth of 35 meters (115 ft), it holds 460–500 million cubic meters (370,000–410,000 acre⋅ft) of water.
  
  ## History
  
  Under the Qin, Huangqi and Dai lakes formed the northern boundaries of Yanmen Commandery, marking part of the northern frontier of the Chinese empire.
  
  