Chinese social media giant RedNote has opened an office in Hong Kong, its first outside mainland China, a move the city’s finance chief hopes will provide a boost to local businesses and the platform’s international expansion. Financial Secretary Paul Chan Mo-po said on Saturday that he had personally invited the company, also known as Xiaohongshu, to set up a base in the city. “When I visited Shanghai at the end of last year, I made a special visit to Xiaohongshu’s headquarters,” Chan wrote on...