See J. Chang and Q. Bai, In Pursuit of Heavenly Harmony: Paintings and Calligraphy by Bada Shanren (catalog of exhibition at Freer Gallery, 2003).
Metallic chemical element, one of the transition elements, chemical symbol Ta, atomic number 73. It is a dense, hard, unreactive, silvery gray metal with an extremely high melting point (5,425 °F [2,996 °C]). Relatively rare, it occurs native in a few places. It is difficult to separate from niobium, the element above it in the periodic table, with which it shares many properties. The most important uses are in electrolytic capacitors, corrosion-resistant chemical equipment, dental and surgical instruments, tools, catalysts, components of electron tubes, rectifiers, and prostheses. Its compounds are relatively unimportant commercially; tantalum carbide is used in machine tools and dies.
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(born Oct. 6, 1888, Hebei province, China—died April 28, 1927, Beijing) One of the founders of the Chinese Communist Party (CCP). Chief librarian and professor of history at Beijing University, Li became inspired by the success of the Russian Revolution and began to study and lecture on Marxism. In 1921 the study groups Li had created formally became the CCP. Li helped the new party carry out the policy of the Communist International (see Comintern) and cooperated with the Nationalist Party of Sun Yat-sen. His career was cut short when he was seized and hanged by the warlord Zhang Zuolin, but his ideas of a revolution of the impoverished peasantry were brought to fruition by Mao Zedong.
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