Right now, China has a new type of tank far in the development pipeline. It's just not done yet.
So tanks are fairly if not very important to the PLA, otherwise they would not choose a revolutionary design, only add incremental updates to the Type 99A, like Germany does with the Leopard 2 for example.
China would need to deploy tanks in a counterattack against south Korea, should they engage in hostility. India is another target. There is also a slim but existing chance that NATO could be aggressive, and China does share an indirect land border with them through Russia.
Staying ahead of NATO in tank design is a priority for the PLA.
Due to ease of transport and the wide range of terrain they can be used on, China's tanks will tend towards the 65t range rather than 70t+, but that doesn't mean it won't be a revolutionary design.