HONG KONG (AP) — Hong Kong’s leader on Tuesday said the sentencing on spying charges of a U.S. citizen in China, who was also a permanent resident of the semi-autonomous city, illustrated that the territory should “stay vigilant to national security risks hidden in society.” The government said mainland Chinese authorities had informed Hong Kong of the arrest of John Shing-Wan Leung in 2021. He was sentenced Monday to life in prison. Hong Kong’s government was prepared to provide assistance to anyone arrested by mainland authorities upon request but had not yet received any in Leung’s case, authorities said. Neither...