A top Chinese security official has told law enforcement officers to make use of hi-tech tools like big data and artificial intelligence at a time of rising uncertainties at home and abroad. Chen Yixin, secretary general of the Central Political and Legal Affairs Commission, which oversees law enforcement and security, made the remarks during a tour of southern Guangdong province last week. He visited seven cities – including Guangzhou, Shenzhen, Zhuhai and Shanwei – and held seminars with local cadres during the three-day trip, according to a statement from the commission. “The security environment at home and abroad has become...