BEIJING - The discovery of a woman's corpse in an elevator in the Chinese city of Xi'an has led to the detention of an elevator maintenance crew who improperly cut off power to the elevator a month ago without checking if anyone was inside In a statement posted Saturday, the Gaoling district government said two maintenance workers turned off the power source on Jan. 30 to the elevator in a residential building after they were called to check on a glitch. When a crew returned a month later, on March 1, for repairs, they found a female corpse there, the government said. The woman was identified as a 43-year-old resident who was living by herself. Police ruled out any foul play but concluded her death was caused by the gross negligence on the part of the maintenance crew in a case of involuntary manslaughter, the government said. China has poor records on workplace safety where proper safety procedures and practices are routinely ignored.