I sometimes think common sense has taken a holiday here...a long, long, possibly permanent holiday! This is of the metro construction along Hongqi Avenue in eastern Harbin, and if you look closely on the left under the trees you can see a mom and her toddler, not even two meters away from where a huge steel beam is being lowered into the earth. There's nothing protecting them beyond the flimsy barricade pictured - one slip and someone will have lost his wife and child in an instant.
