Study on Wittgenstein's thought of language-games A study on Wittgenstein's thought of language-games Study on the religious thought of Mao Tse-tung Study on moral education thought of Marx and Engels Study of poetics thought of “Shiren Yuxie” Study on Amartya Sen's thought of justice Study on the historical thought of Macaulay Study on the political thought of Thomas Hobbes Wittgenstein's thought and legacy ; Study on the literal thought of Qianlong and Jiaqing