Yu Taihong and his students are seen at the No. 10 Middle School in Kunming, capital of southwest China's Yunnan Province, Sept. 7, 2017. The 73-year-old Yu Taihong started her career as a teacher in 1963. After retirement in 2000, she has been reemployed by the No. 10 Middle School until now. Never married and having no child, Yu has been "addicted" to teaching although she underwent surgeries for 13 times. "My biggest pleasure is to be with my students and I would not leave my platform as long as I can stand up," said the devoted teacher. The Teachers' Day is celebrated in China on Sept. 10 every year. [Photo/Xinhua]