I wish I could be out there looking for him.
I know these trails ok. He must have ventured out of the main trail to still be missing. Some of those secondary trail can be quite treacherous. And if you find yourself with only a broken leg out where no one goes by with no cellphone coverage, there's not much you can do. It's amazing how lost in the middle of nowhere you can find yourself in HK, and only a couple of miles from civilization as the crow flies...
I'd like to know how the research effort is organized too. The Pat Sing Leung isn't that long, and covering the main and all secondary trails in the area can't take that long for a decent sized group of rescuers.