* China win first track cycling gold * Make up for Olympic, worlds disappointment (Adds quotes) By Martyn Herman RIO DE JANEIRO, Aug 12 (Reuters) - Four years late maybe, but Gong Jinjie and Zhong Tianshi claimed China's first Olympic track cycling gold medal on Friday when they outpaced Russia in the final of the women's team sprint at the Rio Games. The Chinese broke the world record in qualifying for the final and while the victory margin was only 0.294 seconds in the final they were always too strong for Russians Anastasia Voinova and Daria Shmeleva. More...