Officials have ruled out earthquakes or mining as the source of a 2.75-magnitude event in 2020 near China's nuclear test site.

Back-flipping, nunchuck-weilding humanoid robots delighted and amazed viewers at China’s annual televised new-year extravaganza with their kung-fu choreography. But they – and their rivals who took to the stage Monday night – also carried a message about just how rapidly Chinese androids are advancing.