Hong Kong’s education minister has appealed to staff, students and parents to get tested for the coronavirus under the government’s citywide screening scheme to build confidence in the return to school later this month.But Secretary for Education Kevin Yeung Yun-hung said a date had not been set for resuming face-to-face classes on a full-day basis, or for the city’s 27,000 cross-border pupils to head back to campus, despite the improving Covid-19 situation locally.His plea on Saturday for the…