Study on Shen Deqian's poetic thoughts Study on Chen Zheng's economic thoughts Study on Zhang Xunhua's economic thoughts Study on Wei Xinghua's economic thoughts 并列题名：Study on Chen Zheng's economic thoughts Study of Gary Snyder's eco-ethic thoughts Study on Liu Guoguang's economic thoughts A study of Gary Snyder's eco-ethic thoughts Study on the dynamics of social thoughts Study on Song Tao's economic thoughts
