The Port of Los Angeles paid a Chinese government-owned shipping company $5 million in 2005 to equip cargo vessels to plug into electric shore power while at dock to keep their massive diesel engines from polluting neighborhoods near the harbor. The company, China Shipping, used the money to upgrade 17 ships, but the city didn't get all the promised environmental benefits. Most of the vessels stopped traveling to Los Angeles in 2010, a Times review of shipping industry data showed.