From China Digital Space
70码 (qī shí ma): 70 KPH
This term originates from an incident in Hangzhou on May 7, 2009 when a young man, Hu Bin, ran over another young man, Tan Zhuo, as he crossed a sidewalk. In the police report, officers wrote that Hu’s car was moving at “about 70 KPH.” (Note: they used an informal word, “码” for KPH.) This ignited controversy because onlookers believed that the car was traveling at least 100 KPH. Additionally, the driver of the car was a “second generation wealthy” young man who was driving a Mitsubishi sports car while the victim was a young college student from a working class family. This made people suspicious that the driver’s wealth influenced the police report and ignited a powder keg of built-up resentment towards the wealthy who used government connections for personal gain. Perhaps because of the public outcry or the circumstances of the accident (the collision caused Tan Zhuo to fly five meters high and twenty meters forward), the police department changed its estimate of Hu Bin’s speed to 100 KPH and sentenced Hu to a three year jail term.
The event is parodied in the "War of Internet Addiction" in which a character drives a motorcycle, the speedometer of which is designed so that speeds above 70 are still displayed as 70. The character boasts that he can never go over 70.