Hong Kong must step up efforts to export its food culture and promote its culinary heritage, industry leaders have said after a recent study found that Cantonese restaurants have borne the brunt of the sector’s slump. Data released this month by the Legislative Council Secretariat’s research office showed earnings for Chinese restaurants in the first quarter suffered the sector’s steepest contraction in revenue, plunging by 27.9 per cent from HK$13.44 billion (US$1.7 billion) in 2018 to HK$9.7...