Development zone. Ningbo Xiangbao Cooperation Zone is a development zone in Ningbo City, Zhejiang Province. It is located in Xiangshan County and was jointly built by Ningbo Free Trade Zone and Xiangshan County. The planned area is 28 square kilometers, of which the first phase of Ningbo Aerospace Smart Technology City has a planned area of ??8 square kilometers. Therefore, Ningbo Xiangbao Cooperation Zone is a development zone belonging to Ningbo City, Zhejiang Province.