I was a doubter about Xi. His early anti-corruption drive seemed most likely to be a way to purge the Party of his enemies, and I assumed he was driven primarily by ambition for personal power.
I was wrong.
If you want to join the CCP, you have to be accepted. It isn’t automatic. Once accepted you undergo training and if you want real power you have to rise: you have to be in charge and deliver.
In this the CCP is similar to the old Roman Republic: high political rank required you to rise up thru the cursus honorum. Doing so required you to gain experience with government: roads, sewage, trade, law and so on. In practice, few people were elected to the highest offices without military experience, and the result was that high elected officials had some actual experience with how both military and civic affairs ran.