Chinese 911 denotes the day of September 11, 2008, on which, the Chinese media started to report on 2008 Chinese milk scandal. At least 300,000 Chinese babies were affected. More details here: http://en.wikipedia.org/wiki/2008_Chinese_milk_scandal
The World Health Organization, which was only notified on 11 September, asked Beijing why it took so many months for the scandal to become public, and to establish whether failure was deliberate or due to ignorance.
A year later, Mr. Zhao lianhai, whose child is a victim of the scandal, organized a memorial of Chinese 911 with some of the victims' parents in his house in Beijing.