I heard rumors about someone a long time ago, which can be expressed as "I have heard a lot about it" in the old saying.

I've heard a lot about you: I've admired you for a long time, and it's usually used as a polite expression when I meet you for the first time. From Tang's "Kaiyuan Tianbao Legacy: County Gods Encounter Tao".

Example:

1. He has long admired Mr. Bennet's young ladies and wanted to meet them.

I've heard a lot about you, and I'm really lucky to ask for benefits in person today.

I have always admired the beauty of Singapore. This time, due to the opportunity to visit relatives, I was lucky enough to go sightseeing in this island country.