Had the opportunity to meet Professor Yu in November 2019. We had time to exchange ideas, and to go for dinner. This meeting was a milestone for me, and I think for several of the people that had this opportunity. Professor Ju made make us rethink the possibilities and approaches for restoration with innovative and ambitious ideas, mixing new and ancient practices. He was also very kind and approachable and willing to share his wisdom to everyone. Immensely grateful for the opportunity to meet him. Professor Yu will always be present！