Four Chinese miners were rescued Friday one-by-one after being trapped 700 feet underground in a gypsum mine for 36 days, according to Chinese state media.<br />They were among 17 miners trapped when the mine collapsed in December in eastern China's Pingyi County in Shandong Province.<br />Rescuers extracted the workers after drilling two access tunnels, the official Xinhua news agency reports .<br />Dramatic footage broadcast by China's CCTV showed one of men, strapped to a harness and clinging to a cable, being pulled to the surface.<br />More than 400 people were involved in the rescue effort, which initially involved drilling four tunnels to try to locate the trapped miners, Xinhua reports.