Passengers ride a subway train themed on the 19th National Congress of the Communist Party of China in Xiamen, East China's Fujian province, on Oct 9, 2017. The city's new Line 1 started test operations on Friday. Three other themed trains－for BRICS, Gulangyu and Mid-Autumn Festival－also were put through tests, which ended on Wednesday. Trials for the new line will start at the end of this year.[Li Linrong/For China Daily]