The self-built old house renovation project in Xi'an, Shaanxi, has a roof area about 300 square meters and the original skylight. The aluminum alloy bamboo tiles produced by Xi'an Penghang Metal Technology Co., Ltd were selected. The length is customized according to the customer's roof slope. The color is dark gray and the thickness is 1.0mm. The entire roof is fixed with keel steel frame screws. At present, the roof renovation has been completed.