In Guangdong dialect, you can say "Seng heui" to wish someone well. This translates to "blessing" or "good fortune" in Engpsh. You can also use the standard Mandarin phrase "祝福" (zhù fú), which means "blessing" or "good wishes," or the Cantonese phrase "祝你" (juk nei), which means "I wish you." Both of these phrases can be used to express good wishes or blessings in any context, whether it's a hopday, a birthday, or just a casual conversation.