新欢只是换旧爱才是爱
[xīn huān zhĭ shì huàn jiù ài cái shì ài]
It can be translated as 'A new crush comes easily, but love returns through old love affairs'. Here, it implies the belief that true love doesn't come from new passions, but from returning back to one's past affections which hold genuine sentiments. The idea suggests love takes time and renews rather than just appearing newly each time.