It's really shocking and sad to know that Xibin died so suddenly at such an early age. We still remember his loving and smiling face and the fun we had with him and his wife playing badminton at Univ of Colorado, Boulder, although we have not seen him and his family for quite a few years. He was a very good person, always cheerful, enjoyed playing badminton and ping-pong, and liked new challenges. We will all miss him. Our thoughts and prayers go to his wife, children and parents. Life is very fragile, we should enjoy every day we have. We hope Xibin's family will soon recover from this tragic accident and continue to enjoy every day of their lives, as Xibin did so to the very last moment of his life. From Aiguo Dai (& Junhong Wang) of Erie, Colorado