File photo shows voters cast their ballots to select members of Autonomous County People's Congress under the Electoral Law of the National People's Congress and Local People's Congresses of the People's Republic of China in Longsheng, southwest China's Guangxi Zhuang Autonomous Region, Dec. 20, 1979. The Electoral Law was enacted in 1953 and completely revised in 1979. It then underwent four minor amendments. The electoral system is the foot stone of democracy, and the principle of equality is a prerequisite to guarantee people's democratic rights. The amendments of electoral law can be seen as records of the development of democracy in China.