我想画中国新疆,甘肃,内蒙古,陕西四个省份的图,绘图时只有甘肃画的出,其他三个省份显示不存在的边界,请问我这个应该怎么改
res@mpMaskAreaSpecifiers = (/"Taiwan","Disputed area between India and China","Xinjiang","Gansu","Shanxi1","Neimenggu"/)
res@mpOutlineOn = True
res@mpOutlineSpecifiers = (/"Xinjiang","Gansu","Shanxi","Neimenggu"/)