"I am deeply sorry for this great loss for the world. I had the privilege to have attended the IFLA World Congress 2025, and be at one of his inspiring presentations. Although I didn't know him, he seems like a very kind person, I am fortunate to have taken a picture with him.

Thank you Professor Yu, for sharing all your wisdom with the world, I am sure your legacy will go on making good to this world. It was a honor to have met you.

I am new in the landscaping profession, I am an architect from Costa Rica."