Hong Kong residents flocked to Shenzhen on Friday, drawn by ‘better service’ at restaurants and family-friendly attractions as the Labour Day “golden week” holiday began.Affordability has also lured droves of Hongkongers across the border, with families budgeting about HK$1,000 (US$128) for a full day in the tech hub, covering restaurants, dental clinics, indoor amusement parks and ice-skating rinks.Labour Day is a statutory public holiday in Hong Kong and marks the start of mainland China’s...