My friend, these things are not as easy as they seem.
This is satellite based view of Earth geography from space:
You see how US and China are located geographically?
China needs SLBM to target cities like New York and Washington. Because overflights over Russia can be risky due to its early warning system in place.
Another thing is that Chinese assets are highly vulnerable to US strikes out in the open. This is why China has adopted defensive postures like hiding its ICBM arsenal in the great wall.
Then we have to consider the ABM systems, ASW capabilities, and advanced surveillance technologies of USA. Not to forget its overwhelming nuclear arsenal.
I know that China has SLBM but US submarines will be already looking for them wih aid of other surveillance systems in place, if hostilities reach to such extreme levels.
Photograph of Chinese submarines from space by a US satellite:
Point is that many 'interesting' tools that the top military planners possess are not normally known to commoners like us. These 'interesting' tools are the game changers.