当烟爱上火柴当火柴要点烟
[dāng yān ài shàng huŏ chái dāng huŏ chái yào diăn yān]
Translating as 'When the cigarette falls in love with the match; when the match ignites the cigarette', this represents the intertwined destinies or relationship between two entities, hinting at the transient and dependent relationship of cigarettes and matches—two things meant to come together briefly but dramatically.