Experience in war even against weak opponents as was the case with the USA and its wars since the 1980s is still valid, because it is an easier way to test and validate TTPs, doctrines and strategies. The PLA has none of this, I am really impressed how the PLA does nothing to remain modern and acquire experience in conflicts using its military power even against weak opponents, there are several countries in Africa fighting against guerrillas being a cause of discord, A good way for the PLA to validate its concepts is to start projecting itself more abroad, even if it is creating a PMC.
There are several countries in Africa fighting against terrorism. I could name more than 10 countries. There is still Syria and Iraq. Anyway...
No, as what would count in a war between US and China is experience against a hi-tech enemy.
You can then refine your technology and tactics in a suitable way.
Having experience and confidence in say being able to jam 2 decades old radar is almost pointless in this case.