Airport aviation intelligence materials cover a lot of content. The company has completed the maintenance of flight procedures at multiple airports, involving the revision of airport rules, air chart revisions, etc. It also completed magnetic difference measurement, obstacle data and intelligence data maintenance work at more than 20 airports including Hohhot, Yuncheng, Huizhou, Meixian, Zhuhai, Chaoshan, Hotan, Xi'an and Hunan.