Whenever you are trying to buy an item or just trying to call the waiter for the bill, you call them uncle, auntie, Leng zaii, Leng luii or boss.
We don’t know why we do that, but we just do.
Customer: Oi Leng Zaii, Char Koay Teow satu(one in malay)
Shopkeeper: Ok boss boleh.
It is in our nature that we address strangers as Uncle, Auntie, Leng Zaii, Leng Luii or boss.
So the next time you want to buy something from a young man, call him Leng Zaii and he will surely give you a 50% discount off his items.