The Chinese can lob one to Seattle or LA already one of their Generals threatened us about it..
If you can put satellites in orbit (and remember the huge amount of help the Chinese got with their guidance systems through the corrupt Clinton Administration), you can hit any place on Earth with a ballistic missile.
Intentions are the key, not capabilities. Are the Chinese crazy enough to risk the devastation that would fall on them if they did such a thing?
Probably not. But the North Koreans very well may be. If their leadership is not actually insane, they do a good job of faking it!