The chairwoman of South Korea's Hyundai Group spent a few hours in North Korea on Monday to attend an anniversary memorial service in honor of her late husband Chung Mong-hun, who used to operate a cross-border travel business.Seoul-based Yonhap News Agency reports Hyun Jeong-eun's visit was limited to the service at the Mount Kumgang tourist resort and an inspection of Hyundai Asan facilities there.Neither she nor the 22 Hyundai executives in her delegation spoke officially with any North Korean officials.Hyundai Asan operated tours to the Mount Kumgang resort in North Korea from 2003 until they were suspended in 2008 after a South Korean tourist was shot dead by a North Korean soldier.