Scores of mainland China students have fled Hong Kong over fears they will be attacked in retribution for the death of undergraduate Chow Tsz-lok on Friday.The Hong Kong University of Science and Technology student died four days after falling from a car park in Tseung Kwan O as a police dispersal operation, which included the firing of tear gas, took place nearby.News of Chow’s death led to more violence at HKUST, with protesters trashing the residence of university president Wei Shyy, and…