Yuguang Zheng, 65, and his wife, Shuyin Yang, 62, were passengers on board American Airlines flight 77.
   They were returning to China after visiting their daughter in the U.S. for almost a year. Mr. Zheng was a retired chemist who graduated from Nanjing University. His wife was a retired pediatrician who graduated from Shanghai Second Medical University. They were married for 35 years. A reserved man, he loved painting and was accomplished at taichi, while she was an active, open-minded and kind lady who was good at cooking. Family was the most important thing to both of them. They loved each other and their children.
   Survivors include their son Shidong and daughter Rui.
   We will not forget them.