Foreign institutional investors piled into China’s 8 billion yuan (US$1.24 billion) sovereign bond sold in Hong Kong on the eve of the launch of the southbound leg of the Bond Connect scheme.The offering, which has tenures of two years, five years and 15 years, was oversubscribed by double on Thursday and attracted 24.56 billion yuan in total orders from investors worldwide who bid via tender through a mechanism run by the Hong Kong Monetary Authority, according to an announcement by the de…