We meet Kiu Fung literally on the last good day of his life.
Do you find it somewhat sad that when we (along with Deun Yu) meet Kiu Fung for the first time in DGSD, it's literally the last good day of his life?
That day (or night), he had a great drinking session with a good new buddy (e.g. Deun Yu). Kiu Fung really enjoyed it. The next day, however, his Khitan heritage was revealed and he was banished from the Beggar's Union, starting a long downward spiral in his life.
It's pretty sad to think that when we first encounter Kiu Fung, it's during the final happy hours of his life.