In Chinese mythology the Fucanglong (simplified Chinese: 伏藏龙; traditional Chinese: 伏藏龍; pinyin: Fúcánglóng), Futs-Lung or Futs-Long, are the Chinese underworld dragons which guard buried treasures, both natural and man-made.
Volcanoes are said to be created when Fucanglong burst out of the ground to report to heaven.