我有病你有药我两真默契
[wŏ yŏu bìng nĭ yŏu yào wŏ liăng zhēn mò qì]
This can be understood humorously as 'I am sick, you have the cure, we fit so well together'. It conveys a lighthearted view of how two people complement each other in solving each other's problems or shortcomings.