Some concerns:
1. Lack of nuclear doctrine
Chinese official nuclear doctrine didn't change much between 1960s and 2020s. Come on, they are pretending business still as usual while approaching parity with US/RU in early 2030s. It is not nuclear posture works and they should change it.
2. Lack of survivable NC3
For example, airborne nuclear command is essential to flexibility and credibility of nuclear deterrence, I see no such plane yet. You can't rely on ground-based radio station in a nuclear war. And they should upgrade their strategic comms satellites soon.
3. No show of strength
Can you believe that PLARF never shows a real DF-41 apart from 2019 parade. Yeah it is what happens right now. Nuclear deterrence is to show your adversary that they have to take unacceptable loss in a nuclear war therefore you have to show they how. PLARF is hiding every advanced missiles from spotlight and roll outs old DF-11, DF-15 every time. Jesus, can someone imagine that PLAAF release J-7G and J-8F only all day long in 2024
4. No nationwide exercise
PLARF operates at a rather local stance compared to NATO/Russia who has annual nuclear exercise to practice coordinated strike/counter-strike. Meanwhile PLARF exercise is all about "I am the fastest kid in launching" or "mom I live in a tunnel for 3 weeks long" and I am not even kidding, anti-fatigue exercise in a tunnel is an essential part of their training.
In case if someone is asking "how do you know have all these stuffs, what if they have but don't show us." They should, it is their job to showcase their readiness to achieve deterrence.