If you base 022s out in the Spratlys, you can provide offboard targetting support. For instance, Fiery Cross Reef is occupied by China. They claim they have no troops there yet they've built a navy harbor, an airstrip, and an observation tower there. It's not that hard to add a strong radar, SAM, and maybe base two fighters out there. The 022 does have datalink so I don't see why it can't work in conjunction with the garrision. I'm not saying the 022 can then make major offensive assaults but rather defense of the garrison and maybe raids such as to enemy shipping. The major shipping lanes aren't that far away.
With China trying to improve its image as a benign power, any more addition to firepower on the Spratlys would be seen as provocative, especially after the agreement with the other nations to resolve the Spratly issues through discussions.
maybe base two fighters out there.
It will sound harsh, but I must call this out to be a downright ridiculous suggestion.
Personally, I think it does not make more sense to station any more vessels in the area. Should there be a need for military presence, the best option would be to send Jianghus, Jiangweis or Ludas. These would be the perfect platforms in my opinion, better than the 022s for the likely scenario of a faceoff. They are well equipped with guns, which are good for firing a warning shot across the bow of any intruder vessel. The 022 has no such gun other than the CIWS. Should the need to escalate the engagement arise, then since the Jianghus/Jiangweis and Ludas are likely already within close proximity of the enemy vessels, and the firepower from the guns would be more valuable than the missiles, which are probably not able to be fired since the enemy vessel is likely to be within minimum range. If they are not, the Jianghus/Jiangweis and Ludas vessels are still more amply equipped with missiles than the 022 or their likely opposition.