The "Nanjing judge" refers to an infamous 2006 incident where a young man named Peng Yu went to the aid of an elderly woman who had fallen down on the street in the eastern city of Nanjing. At the woman's request, Peng helped take her to the hospital only to have the woman turn around and accuse him for being the person who knocked her down. A Nanjing judge then ruled that "common sense" suggested that Peng only took the woman to the hospital because he was guilty and ordered him to pay her medical expenses.
The story was picked up by the Chinese media and quickly became a cautionary tale for many Chinese: no good deed goes unpunished.
In 2009 it was reported that an elderly man, also in Nanjing, fell while getting off a bus. Usually this wouldn't be news except for the fact that he was only helped up by onlookers after he himself bore responsibility and announced to them that he had fallen on his own.
As news of the hit-and-run spread across the web, another Sina Weibo user "Rushing Forward" wrote, "It can only be said that the [woman who help YueYue] doesn't read news on the internet."
The China Daily reported that in September the Ministry of Health went as far as to issue guidelines on how to help elderly individuals who had fallen down. "Don't rush to lend a hand to the elderly after seeing them fall over. It should be handled by different measures in different situations," the ministry warned This includes determining person's physical condition, determining the cause of the accident, and making a plan for rescue workers all before deciding to lend a hand.