March 30, 1979: Deng speaks on "upholding the four fundamental principles"

March 30, 1950: The Ministry of Education announces that International Children's Day on June 1 will be known as Children's Day in China

March 30—May 22, 1976: The crews of China's "Xiangyanghong 5" and "Xiangyanghong 11", two 10,000-ton ocean-going scientific research ships, conduct research on ocean hydrology and meteorology in the South Pacific Ocean

March 30, 1979: Deng speaks on "upholding the four fundamental principles"

Entrusted by the CPC Central Committee, Deng Xiaoping describes the "four fundamental principles" of modern China: to maintain Socialist doctrine, uphold the dictatorship of the proletariat, uphold the leadership of the Communist Party and uphold the Thought of Marxism-Leninism and Mao Zedong.

March 30, 1998: The CPC Central Committee orders all localities and government departments to enact the "Working Ordinances of the CPC and the Grassroots Organizations of the State Organs"