One hundred metres underground in a pit in northern China, miners extract lumps of coal with the flick of a finger on a smartphone -- a sign of how the traditionally dangerous and dirty work is being updated for the digital era. The Hongliulin "intelligent mine" in the coalbelt Shaanxi province is a flagship facility in a drive aimed at modernising China's thousands of coal mines, even as the country pledges to peak its greenhouse gas emissions by 2030. IMAGES AND SOUNDBITES