A lurking danger in the subway

A woman fell through the floor into a drainage area before walking onto an escalator in a subway passage in Shenzhen, Guangdong Province last Saturday. It occurred as she stepped on a broken drainage cover. Nearby people helped catch her as she fell. Thankfully, the woman was not seriously hurt. In response to the accident, subway authorities have already changed all drainage covers in the passage, apologized to the woman and thanked the passersby for their quick thinking.