The University of Hong Kong has secured a seven-year-high ranking on a global tertiary institution chart, while four other local universities were downgraded by four to 16 places.Tsinghua University in mainland China remained the highest-ranking institution in Asia – while its major rival, Peking University, has overtaken the National University of Singapore to get the second rank in the continent.The flagship institution of Hong Kong was placed 35th among the top 200 for 2020 in the rankings…