In the past twenty years, the Chinese government has been adopting open door and economic reform policies. Because of historical, economic, legal, and cultural traditions, a modern corporation system is far from being established in China. There are lots of things that need to do to establish a perfect corporate system. This thesis reviews diverse interpretations of the function of poison pills in light of recent judicial decisions and underlying empirical evidence. It also reviews recent judicial decisions regarding the new version of poison and dead hand pill. The author discusses the recent trend of by-law restrictions in an attempt to limit the abusive use of poison pills. The conclusion drawn is that poison pill plans must be designed to encourage bargaining between target management and hostile acquirers.