Trains were stopped, schools were halted and residents were evacuated in southern China as Typhoon Noul headed towards the coast.The National Meteorological Centre issued an orange typhoon alert – the second highest level in a four-tier system – on Saturday morning as it moved northwest across the South China Sea at a speed of 20km/h (12mph).It was expected to land somewhere between Hong Kong and Huilai county in eastern Guangdong overnight with wind speeds of up to 151km/h and then move...