'Most of the Chinese food you love? It's from Hong Kong': Jeremy Pang on the city's irresistible cuisine / Can mainland Chinese restaurants break into Hong Kong's dining scene amid changing tastes? / Hong Kong appetite for dining out continues to fall, latest restaurant sector figures show / Hong Kong restaurants serve up variety of utensils with ban on single-use plastics set to take effect / Hong Kong's ailing restaurants ask mainland Chinese operators for survival tips, call on veteran singers to strike a chord with diners