Q: What do you call a Chinese Billionaire?
A: Cha-ching!
Listen up, buttercup. It's "Explain bear" time. The joke is a pun using "Cha-ching!" which is the sound a cash register makes. The joke plays on the stereotype that all Chinese people's names start with "Cha". I can tell from your smooth brain that you probably believe that. It's also kinda racist. Sad!