Lisu villages generally contain between 100 and 200 persons, distributed in 20 to 50 households. Two types of housing are found: one is a simple wooden structure built of 4-meter-long pieces of timber and roofed with wooden planks; the other is a more complex structure of bamboo and wood supported above the ground by twenty to thirty wooden stakes and covered with a thatched or wooden roof. The upper level is family living space, and the space below the floor shelters the family's livestock. Such houses are surrounded by bamboo fences. The central room of the house holds a fire pit.