Even can not believe it right now! I couldn't expect the email on JAN 20 was the last communication between us. We discussed our paper for a week before my trip to China. You are so hardworking and active. We played soccer together, joined your thanksgiving party and NY probability seminar every year. You are really a brilliant researcher and great friend mentor in my life. You taught me how to do research and provided great help in everyday life. All of us will take care of Sunny and Jimmy. Hope you rest in peace! You will always be in my heart!