Completely shocked, I received the call from Sunny on Saturday. Professor Wenbo Li, my adviser, my friend, you have left, too soon, too sudden. The meeting we were supposed to have this week, the ski trip you planned to organize in February, your biggest challenge of climbing to Everest Base Camp in the near future… all gone. But you will always be in my thoughts. Some people come into our lives, leave footprints on our hearts, and we are never the same. Your passions in math, your positive attitudes towards life and your caring of the family all have influenced your students. I’m so proud of being your student. May your heart and soul find peace and comfort.