The development comes as tight coal supplies in China and toughening emissions standards have triggered a contraction in heavy industry in several regions. Several Apple and Tesla suppliers have suspended production at some Chinese factories for a number of days to comply with tighter energy consumption policies, putting supply chains at risk in the peak season for electronics goods. Two major Taiwanese chipmakers, however, said their China facilities are operating as normal. The development comes as tight coal supplies in China and toughening emissions standards have triggered a contraction in heavy industry in several regions, dragging on the country's economic growth rate, analysts have said. Apple supplier Unimicron Technology late on Sunday said three of its China subsidiaries stopped production from midday on September 26 until midnight on September 30 to "comply with the local governments' electricity limiting policy". The Taiwanese maker of printed circuit boa...