How many square meters is the underground civil air defense area of Suqian Lantianyuan?

The underground civil air defense area of Lantianyuan in Suqian is 15800 square meters. According to relevant information, the aboveground building area of Blue Sky Garden in Suqian is about 85,500 square meters, and the underground civil air defense area is about 1.58 million square meters. Suqian, located in the north of Jiangsu Province, is the youngest prefecture-level city in Jiangsu Province and belongs to the cross-radiation area of Huaihai Economic Belt, Coastal Economic Belt and Economic Belt along the Yangtze River.