Gas explosion kills 31 in ChinaBROKEN VALVE: All regions in China should address risks and ‘hidden dangers’ in the hospitality sector, and launch campaigns to improve safety, Xi Jinping saidAP, BEIJINGCooking gas caused a massive explosion at a barbecue restaurant in northwestern China, killing 31 people and injuring seven others during national celebrations on the eve of a long holiday weekend, authorities said yesterday. The explosion left many people unconscious and they needed to be carried out of the shop, online news site The Paper reported, quoting a member of the search-and-rescue team. Smoke rises from a building after a gas explosion at a barbecue restaurant in Yinchuan, China, on Wednesday. An hour before the explosion, employees noticed the smell of cooking gas and discovered that a gas tank valve was broken, Xinhua reported. Chinese President Xi Jinping (習近平) demanded urgent medical care for the injured and a safety overhaul after the explosion, Xinhua said.