One year after he pledged to run the Standard Chartered Hong Kong Marathon blindfolded, a “nervous and fearful” Marco Wong Sui-kam is set for his very own race in the dark on Sunday. Wong has covered the 26.2-mile Hong Kong course in each of the past 20 years. Shortly before last year’s race, where he ducked under three hours for the second time, Hongkonger Wong was introduced to Kim Mok Kim-wing, who in 2010 founded the Fearless Dragon Running Team for blind runners and deaf guides. Kim...