Passengers make the popular "go!" gesture beside a high-speed train in Shenyang, Northeast China's Liaoning Province. The world's first high-speed railway in an extremely low-temperature area started operation Saturday and runs across three provinces in Northeast China. The "go!" gesture has become popular among Chinese citizens since November, when it was made by two launch officers at the successful takeoff of a J-15 carrier-based fighter from China's first aircraft carrier "Liaoning." Photo: CFP