The second of a two-part special looking at one of the world's toughest ultramarathons and this year's historic event during the pandemic. SCMP sports reporter Mark Agnew catches up with runner Hyun Chang Chung after his historic finish in the 2021 Hong Kong Four Trails Ultramarathon, talking about the race, the community, what he remembers and what it was like to run for nearly three days without assistance. Full story: https://bit.ly/3c20L7H