Lower priority doesn't mean that this capability should be behind the curve.
Chinese axes of interest aren't land - sure, but number of potential ground conflicts is more than enough.
From Korea going hot and warm, to larger scale Pacific warfare(fighting on Islands is fighting on land), to, I don't know, collapse of Russia under the weight of western pressure.
Technologically the military is probably incentivizing industry to stay up with modern demands, with development, trials and limited production runs being done.
However at-scale procurement is very much another matter, and is far from the wholesale service wide uplift that is seen in other domains.
If the CMC wanted the PLAGF to be modernizing faster than it was, then we'd be seeing it done so already, but they know that opportunity cost exists so the PLAGF will have to get by with certain platform categories not being as high end at scale, as others.
(Incidentally there are however some PLAGF platform categories and systems that are very much both quite modern and also being pursued at scale, such as truck mounted tube artillery across 122mm and 155mm calibres, as well as large rocket artillery, high mobility units, and of course PLAGF organic ISR capability, and networking as well, which goes to show the types of capabilities the PLAGF wants to maintain very competitively and at scale while being on a budget)