小三落后闺蜜上档次
[xiăo sān luò hòu guī mì shàng dàng cì]
It can be interpreted as “Cheating lover is outmoded, best girlfriends are now more valued.” The name implies a change in perspective: instead of seeing affairs and infidelity as exciting or desirable ('小三' means 'a mistress' ), people appreciate genuine friendship with high-class besties. This could also imply that someone has had negative experience regarding betrayal, and values deep-rooted companionship above all.