Pankou 盤扣 盘扣 - The Fancy Button Knots
I was writing up my Instructable, which tangentially included stuff on qipao buttons, The Genshin Impact Cosplayer's Knot Guide and went looking for a good current page with lots of fancy buttons. I found two: pankou buttons from East Meets Dress which has more pictures and a shred more information on the making and similar from The Pankou which has the Chinese: 盤扣, 盘扣, pán kòu. It was only when reading the latter that I realized that 盤扣, a term I've seen before, actually meant the fancy button knots! Further down, they refine it further: 襻花盤扣, 襻花盘 扣, pàn huā pán kòu, which means floral knotted buttons which they explain is, basically, generic extra fancy. One might describe exact shapes like butterfly (蝴蝶, 蝴蝶, hú dié) but 襻花 describes with sufficient precision.
҉ː̗̤̣̀̈̇ː̖́(⊙。⊙)ː̖́ː̗̤̣̀̈̇҉.
After a little more fussing with translation and search, I landed on 扣盤花襻芯嵌, which brought me to Square inch and clever heart, every detail - exquisite buckle (Part 3) (part 1 is here and part 2 is here)