Hong Kong rescuers are searching for a man who has been missing since Saturday, with authorities discovering one of the 81-year-old man’s shoes nearly 20 hours into the operation.Police said on Sunday that the man, surnamed He, was hiking with his wife along Section 10 of the MacLehose Trail at around 10am the day before. The couple had been heading in the direction of the Tai Lam Chung Reservoir in Tuen Mun, the force said.According to a social media post from the man’s adult child, he split...