Li Guanghua is a football player.对 a football player提问.

问题描述:

Li Guanghua is a football player.对 a football player提问.
可以用who's Li Guanghua?提问吗

不可以.
football player是一种职业
对表示职业的名词提问要用 what's sb?
所以:What is Li Guang?
而且= What does Li Guang do?
=What's Li Guang‘s job?