Hong Kong’s finance chief praised a blockbuster film about the Teochew community as it premiered locally on Friday, and highlighted the ethnic group’s contributions to the city’s development, even as some critics panned the production as overly patriotic. Dear You, an unexpected box-office hit that was shot on a shoestring budget, focuses on a grandson’s efforts to learn more about his family history by tracing letters sent home in Chaoshan from Thailand. The film will go into general release in...