It's not the CAC and the PLAAF job to keep the J-20 watchers and their fans entertained.
Actually it is, after flying the J-20 for the first time during Bob Gates visit, they built an implied desire to "show the world" China's very first 5th gen taking to the air, and the follow on prints and pressors built an audience, and no doubt Chengdu and the PLAAF enjoyed the attention, and the enhanced status that producing such an aircraft entitled them to.
to be honest it seems as if Emperor XI is relishing taking China back to the past, and back into the "outer darkness" of isolation??? In my opinion the Chinese people deserve better, I have some Chinese friends whom I have not attempted to contact, and whom I have not heard from in some time??? I am concerned about them, and concerned for their safety and their freedom, and indeed their lively hoods and lives. I don't like that type of heavy handed overlord, we have one of those over here now!