《太平广记·卷四百八十·蛮夷一》
鹤民大多数都在山涧溪岸的旁边，凿洞建筑城池，有的三十步五十步就是一座城，像这样的城不止千万。
人多在山涧溪岸之旁，穿穴为国，或三十步五十步为一国，如此不啻千万。
Most of the crane people live by the streams and rivers in the mountains, chiseling holes and building cities. Some cities are thirty to fifty steps away, and there are more than thousands of cities like this.