法海深情于许仙
[fă hăi shēn qíng yú xŭ xiān]
'Fa Hai deeply in love with Xu Xian' references characters from a traditional Chinese legend 'The Legend of the White Snake'. Fa Hai is the Buddhist monk who tries to separate Xu Xian (a man) and his wife Bai Suzhen (a snake spirit). It's often used humorously as people don't expect Fa Hai could have romantic feelings for Xu Xian.