绘制中国地图，并根据站点位置信息标注站点。-Draw a map of China, and marked according to the site location information site.

grads绘制中国地图的方法，且只在中国区域上绘制彩色，并且标注了南海等海域-Draw a map of China grads method, and only draw on Chinese color area, and marked the South China Sea and other