Actually, the dress, hairdo, customs were changed back as soon as ROC was established. As for languages, I do not think standard Chinese is Manchus language. Do not make reference simply from the English world Mandarin. I hope you are not that dumb.
BTW, During Qing's rule, China indeed became larger than before. For example, Qing put Xinjiang, Tibet and Mongol under control firmly. Those were not done successfully during Ming completely. Qing lost a lot of land as well to western invaders. However, overall, Qing still brought in a lot of lands than Ming empire.
Furthermore, your own empress even got raped by the japs. You even dare to laugh at China's misfortune???
n.k.s are just like v.n.s.
Both are double-faced ungrateful bastards.
In n.k. n.k.s were told kim was the main force to defeat u.s. led u.n. forces. China was rarely mentioned.
In v.n., its own generals were the main leaders to defeat france as well as us. China was not even mentioned.