While the United States and several other western countries passed laws creating computer crimes beginning in the 1970s, China had no such legislation until 1997. That year, China's sole legislative body, the National People's Congress (NPC) passed CL97, a law that criminalizes "cyber crimes", which it divided into two broad categories: crimes that target computer networks and crimes carried out over computer networks. Behavior illegal under the latter category includes among many things the dissemination of pornographic material and the usurping of "state secrets."