Dear Dr Sanbar’s wife and family, we are shocked and deeply saddened to learn of Dr. Sanbar’s passing. I would like to express my deep sorrow and sympathy to you and your family. Looking back on the scene of meeting Dr. Sanbar two months ago, I can still remember his voice and smile. I have known Dr. Sanbar for many years. Dr Sanbar is both a good teacher and a good friend to me. He is knowledgeable and sincere, and has friends from all over the world. He has helped my family and I much. His sudden passing makes us feel that we have lost a good trustworthy friend. His noble character and virtue are worth learning and remembering. Wang Letian