The Chinese embassy in Singapore has rapped a former senior diplomat in the city state for an op-ed where he argued, among other things, that the coronavirus epidemic had dented the Chinese Communist Party’s credibility with its citizens.Bilahari Kausikan, who retired as permanent secretary of the Singapore Foreign Affairs Ministry in 2013, described China’s handling of the crisis as a consequence of its Leninist value system, where a vanguard party has absolute control of state and society.He…