Cigarette butts will be considered “strong evidence” of a possible breach under a proposed construction site smoking ban, Hong Kong’s labour chief has said, even as he sought to reassure contractors that preventive measures could shield them from the maximum HK$400,000 (US$51,070) fine. Secretary for Labour and Welfare Chris Sun Yuk-Han revealed further details about the ban in an interview with the South China Morning Post held amid an inquiry into the deadly Wang Fuk Court blaze, which heard..