what's the way to Beijing 中的主语是what还是the way to Beijing?

what's the way to Beijing 中的主语是what还是the way to Beijing?

我认为the way to beijing是主语.
这是个倒装句吧、
如果这么看：the way to beijing is what.因为是问句么(对去北京的路进行提问,所以主语就应该是the way to beijing),所以就说what is the way to beijing
如果还不懂：看：who is he who are they?主语是he ;they,而不是who.对不对?
恩、纯属个人意见

what 是主语.is 是系动词，the way to Beijing 是表语

What 是主语.is 是谓语，the way to BeiJing 是宾语
西西 @_@ ^_^ *_*

what 是主语.is 是谓语，the way to Beijing 是宾语