Rescuers are seen at the explosion site of a gold mine in Qixia City, east China's Shandong Province, Jan. 12, 2021. More than 300 rescuers have joined the search for 22 workers who were trapped underground after an explosion ripped through a gold mine under construction in Shandong, local authorities said Tuesday. (Photos: Xinhua)

A communication support staff member is seen at the rescue site of a gold mine in Qixia City, east China's Shandong Province, Jan. 12, 2021. More than 300 rescuers have joined the search for 22 workers who were trapped underground after an explosion ripped through a gold mine under construction in Shandong, local authorities said Tuesday.

Rescuers are seen at the explosion site of a gold mine in Qixia City, east China's Shandong Province, Jan. 12, 2021. More than 300 rescuers have joined the search for 22 workers who were trapped underground after an explosion ripped through a gold mine under construction in Shandong, local authorities said Tuesday.

Rescuers are seen at the explosion site of a gold mine in Qixia City, east China's Shandong Province, Jan. 12, 2021. More than 300 rescuers have joined the search for 22 workers who were trapped underground after an explosion ripped through a gold mine under construction in Shandong, local authorities said Tuesday.

Rescuers are seen at the explosion site of a gold mine in Qixia City, east China's Shandong Province, Jan. 12, 2021. More than 300 rescuers have joined the search for 22 workers who were trapped underground after an explosion ripped through a gold mine under construction in Shandong, local authorities said Tuesday.

Aerial photo taken on Jan. 12, 2021 shows the rescue site of a gold mine in Qixia City, east China's Shandong Province. More than 300 rescuers have joined the search for 22 workers who were trapped underground after an explosion ripped through a gold mine under construction in Shandong, local authorities said Tuesday.

Aerial photo taken on Jan. 12, 2021 shows the rescue site of a gold mine in Qixia City, east China's Shandong Province. More than 300 rescuers have joined the search for 22 workers who were trapped underground after an explosion ripped through a gold mine under construction in Shandong, local authorities said Tuesday.