It's been five days since an explosion ripped through a gold mine in Qixia City, Shandong Province in east China, and 22 miners are still trapped underground. Over 300 rescuers have been working around the clock to search for the trapped miners. Rescuers are still unable to make contact with the miners underground because the communication system has been damaged by the explosion. CGTN's Huang Yue takes a closer look at the rescue operation.