Beijing’s point man overseeing Hong Kong affairs has begun a five-day fact-finding visit to the city, his third since taking office. Sources have said Xia Baolong, director of the Hong Kong and Macau Affairs Office, will focus on assessing the city’s progress on both development and security fronts. The Post examines the importance of Xia’s visits to the city – from his past itineraries to messages issued to city officials. 1. What will Xia be doing during his visit? Xia will attend a national...