Can't you be blessed with a long life?

It's an idiom in China, which means longevity is as high as the sky. It's a congratulatory message.

A greeting is a sentence that expresses good wishes to people. In social development, greetings are not limited to festivals and banquets. Ordinary couples send messages to each other, greetings and blessings from weather changes, encouragement and blessings from friends every day, and greetings and blessings every morning.