I believe China will defeat the US in a conventional war setting in scenarios like Taiwan war or war at East/South China sea or both etc.
The one major yet only uncertainity is the nuclear weapons, regardless of whatever study, it is generally believed that China's strategic nuclear arsenals, especially the delivering vehicles that could hit the enemy state, is at a significant disadvantaged position WRT the US.
Such position, if not addressed properly, will encourage the enemy using nuclear threat in a conventional war to limit the optioins for PLA to fight or even the weapons they use.
I think senior leaders in CCP know this as well, thats why China will need to significantly expand our strategic nuclear arsenal before a war with US, which could lead to a war once and for all.
Judging by China's giant industrial power and with the help of China's friends, especially these central Asian states who has large U mine, I think it may take just 5 years or so before China get sufficient ICBMs to prevent US from even think about using nuclear bombs in a war they will doom to lose otherwise.
Thats why China plan to take back Taiwan in 2025 or so.