Retired harbour pilot Alex Yu Chi-leung sailed his 50-foot wooden yacht, Bowline, from Causeway Bay in Hong Kong to Dongao Island in Zhuhai under a new cross-border yachting scheme last week, but bureaucratic hurdles and shallow waters tempered the excitement of the leisure trip. It was Yu’s first voyage under the scheme, but it could also be his last unless mainland Chinese authorities improve certain requirements. “If the procedures are simplified – because right now they are too numerous,...