Hundreds of mainland visitors have made the most of Hong Kong’s holiday marking the city’s return to Chinese rule by flocking to popular tourist sites and enjoying discounts, free museum visits, ferry and tram rides, and cheap tickets at several major attractions. Undeterred by the cloudy and rainy weather on Tuesday, they gathered at popular locations across the city, including Central, Causeway Bay, Mong Kok and Tsim Sha Tsui, with many planning to spend good money on the 3,800 restaurants...