A northwestern province on the frontline of China’s coronavirus battle reported on Tuesday its first cases in nearly three weeks, all involving travellers from overseas, as imported infections started to level off elsewhere. Like other countries hit by the pandemic, China has ordered tough curbs for arriving travellers, such as mandatory quarantine, besides cutting back on international flights and limiting arrivals of foreigners, including business visitors. The province of Shaanxi reported 21 new infections from abroad, as well as seven cases with no clinical symptoms, all travellers on a commercial flight from Moscow bound for the Chinese capital of Beijing.