Beijing’s top official overseeing Hong Kong affairs will visit the city on Tuesday and Wednesday, with a check on the progress of the Northern Metropolis part of the itinerary, while sources say the chief executive will join him as he looks into a cross-border technology cooperation platform. The Hong Kong government announced on Monday morning that Xia Baolong, director of the Hong Kong and Macau Affairs Office, would be visiting the city for two days. “[Xia will] inspect Hong Kong’s alignment...