You could not get much lamer than that.
The bottom line is simply this....China being a rational nation would never risk a nuclear attack in order to attempt a military take-over of Taiwan.
Do you not have any idea of what a nuclear bomb would do to China?
If Bejing was hit with a nuke...............
Bejing would be toast. But there’s more than that. The explosion would also inject a lot of dust and smoke into the upper atmosphere - this could be enough to cause short-term climate changes (cooling) and some have speculated that it could even cause massive crop failures, depending on which city was hit and how close it is to farmland. In addition, with a 400-km radius for thermal effects, there would be a LOT of soot injected into the atmosphere - this would almost certainly have an impact on our climate as well.
Radioactive fallout would not be insignificant, but might not be as bad as many might think - it would depend on how much of the weapon’s yield was due to fission versus fusion. For example, if the fission component provided, say, 1% of the total yield then there would be about 10 MT worth of fission products (about 700 times as much as from Hiroshima); if the fission component were 10% of the total yield then there’d be 10 times as much. Even 10 MT of fission products is a lot. Although, having said that, we put a lot more than this into the environment during the atmospheric nuclear testing days, so it would likely not mean the end of life on Earth.
So - all in all - the city would be gone, the surrounding countryside would be in flames, there would be a lot of radioactivity - but humanity and the planet as a whole would likely survive. Just not very happily.