December 25 saw the opening of two lines. The 293km Harbin \u2013 Mudanjiang line serves Heilongjiang, China\u2019s northernmost province, adding 11 stations to the high-speed network. The 250km\/h line cuts the journey time between the two cities from more than four hours to 1h 28min. An extension across the China-Russia border to Vladivostok is proposed.The 265km Huangshan \u2013 Hangzhou line connects southern Anhui province with the cities of the Yangtze River Delta. Construction began on the Yuan 35bn ($US 5bn) project in June 2014 and the nine-station 250km\/h railway reduces the Huangshan \u2013 Hangzhou journey time from three-and-a-half to one-and-a-half-hours. Initially 11 train pairs a day are operating on the line, increasing to 33 a day from January 5.The 308km Jinan \u2013 Qingdao high-speed line opened on December 26. The 350km\/h line reduces the journey time to 1h 40min, compared with 2h 20min on 250km\/h Jinan \u2013 Qingdao Passenger Railway, which opened in 2008.\r\nThe opening of the 506km Chengde - Shenyang high-speed line on December 29 reduced the journey time between the two cities to 2h 30min. The line is designed for 350km\/h operation, although trains are currently limited to 300km\/h.\r\nChina Railway Corporation also opened three conventional mixed-traffic lines between December 26 and December 29:\r\nYancheng \u2013 Qingdao (429km)Huaihua \u2013 Hengyang (318km)\r\nTongren \u2013 Yuping (47km)\r\nChengdu - Ya\u2019an (140km)\r\nNanping - Longyan (248km)\r\n\r\nAll five lines are designed for 200km\/h operation.\r\nAnother new line in the west\r\nChina\u2019s top economic planner, the National Development and Reform Commission, approved the construction of a 292km high-speed line linking Xi\u2019an with Yan\u2019an in the western provinnce of Shaanxi at the end of December.\r\nThe 350km\/h line will serve 11 stations. A budget of Yuan 55.2bn has been set for the project, which is expected to take four-and-a-half years to complete.