Hook curtain belongs to Ru Yan.
There are stupid flies in the cave.
People who like mice often stay for dinner.
Pity moths don't light lamps.
It means:
Close the curtains and let the homing swallows in.
Open the window and let the screaming flies fly out.
Worried that mice are hungry, they often leave some rice.
Pity a moth, don't light a lamp.