Earlier this year, mainland China’s biggest hotpot restaurant chain, Haidilao, made news by announcing it would enter the Western-style fast-food market with Fresh Burger, serving pizza, pasta, fried chicken and beef patties in buns. Industry observers predicted that chains such as McDonald’s, KFC and Jollibee might soon be shaking in their boots. Although Fresh Burger has yet to debut in Hong Kong, several other mainland Chinese fast-food brands have recently landed in the city, albeit quietly....