What do you mean by great expectations?

Idiom definition: the future: the future. Metaphor has a bright future.

The origin of the idiom: Ming Feng Menglong's "Ming Shi Ming Yan" Volume 5: "Mr. Wang has a bright future, so he should choose to stay at a high place in order to make progress."

Lu Yao's Ordinary World, Volume V, Chapter 26: "Hui Liang has been engaged in administrative work, and he has taken the leadership position. Among his generation, he is a very promising generation. "