Old Man: I will give each of you 10,000 RMB if you move apartments today!
Old Man:?This is great, thank you. Where are you moving to?
Neighbors:?Oh, we just swapped.
This joke is adapted from Xiaolin Guangji (《笑林廣記》, Extensive Gleaning from the Forests of Laughter?), a joke book published in 1781 that epitomized Chinese humor.