Temperatures plunge to historic lows as severe cold fronts impact most of ChinaNew ChengduDedicated efforts bolster nation's health defensesChina sees smooth road traffic on first day of holidayHeavy rains set off flash floods, killing 33 people in Afghanistan,Tsitsipas sweeps aside Ruud to win Monte Carlo Masters for the third time, and then weepsChina regulates unified medicine procurement platformsPeople injured in earthquake get treatment in GansuMcCormick gets Trump's endorsement in Pennsylvania's Senate race despite awkward historyChina to boost private school education with retired teachers