适用于徐港NW502导航凯立德，完美规避非原厂地图问题，此程序是18年春季地图，搭配J22图资使用(It is suitable for Xu Gang NW502 navigation, Kai Lide, which perfectly avoids the problem of non original plant map. This program is a map of spring of 18 years, matching with J22 map.)