Sarah Kwong Sze-oi made history on Saturday by becoming the first Hong Kong woman to throw the javelin beyond 50 metres at the Asian Under-20 Athletics Championships.Already the city’s under-20 record holder, Kwong’s throw of 51.27m at Kai Tak Youth Sports Ground easily eclipsed her previous best of 48.63m.The effort was enough to finish fourth, with Chinese Taipei’s Tai Yu-chin claiming gold with a throw of 56.91m. The Philippines’ Ana Bhianca Espenilla took silver with 52.20m, and South Korea’s Kim Minji bronze with 51.51m.Kwong’s throw also erased a 10-year-old Hong Kong all-age record of 49.37m set by Ng Chi-sum.“Breaking the record on home soil is very exciting,” Kwong said. “I could hear people cheering for me after every throw, which is hard to experience when competing overseas.“Today’s competition was rare because everyone was very close together. We were all moving forward step by step with throws in the 48m and 49m range, and that helped bring out my performance.“When I compete overseas at higher-level meets, many of the athletes are already throwing 56m from the start, so there is less of that kind of pressure and stimulation.”