come to shanghai come to 后,

come to shanghai come to 后,
I want to travel to Shanghai.to Shanghai,是地点状语吗?
Can you come to Shanghai?这里是不是,
不及物动词come +介词 +宾语
如何,区分,不及物动词后面跟的是,状语,还是,介词+宾语?
我问的是，如何，区分“不及物动词”后面的部分，
不是问，介词 后的宾语............