Relating to the Japanese kimono issue, a surprisingly thorny topic is Chinese traditional dress from Qing dynasty (1644-1912).
This is the most recent “old China” costume available, and is seen in many iconic movies and TV dramas. But occasionally people object to it being worn in public, eg. for ceremonial purposes, due to all the awkward associations it has.
Firstly, the Qing dynasty was Manchu, not Han. This really should not matter, as in theory China includes dozens of distinct ethnic groups, and anyway Manchu is practically indistinguishable from Han at this point. But still, Qing is a foreign dynasty, much like Yuan (Mongols), and insufficiently Chinese.
Secondly, the later Qing dynasty was an era of humiliation for China, when the weakened empire was carved up by European empires and Japan, losing a lot of wars and signing a lot of unequal treaties under duress. So it’s a historical period that does not appeal to many nationalists.
Thirdly, the Qing dynasty is “old China”, feudalism, the bad old days, everything that new China got away from. There can’t be anything good about it, otherwise what would that say about new China. The younger generation might not feel this message as strongly, but it’s instructive to look at the opening ceremony for the Beijing Olympics, which featured a historical retrospective which jumped from the Ming Dynasty to the 1990s, consigning the Qing, Nationalists, and Mao all to the memory hole.
So what is a nationalist cosplayer to do? Revive Hanfu, of course!