More than 30 people were hurt following an explosion at PetroChina's [part of China National Petroleum Corporation]...Fushun refining complex in...Liaoning province, the official Xinhua News Agency said...No deaths were reported…Mao Zefeng, PetroChina’s Beijing- based spokesman, said the country’s biggest oil and gas producer is investigating and couldn’t provide more details. The explosion is the second in less than five months at Fushun complex…