The development of China’s shale-gas industry has moved forward over the past year, but far more remains to be done than has been accomplished if the nation’s ambitious production targets are to be met, according to executives attending an energy conference here. Here’s a quick rundown on the status of the industry and the daunting challenges ahead: The Players Only two players have made progress on the ground so far. Leading the pack is state-run China Petroleum & Chemical Corp., or Sinopec, which said this week that its first commercial shale-gas field is running “ahead of schedule.” A worker performs a routine check on the valves at a Sinopec appraisal well in Langzhong county, Sichuan province. The field, in the Fuling district of Chongqing, will produce around 1.8 billion cubic meters of gas this year, 5 billion cubic meters next year and 10 billion by 2017, the company said. […]