Zhongguo cheng xiang jiu ye fa zhan zhan lüe yan jiu, 2001-2010Qingsong Guo · First published 2004Open the Tome
Qi Ye Lao Dong Guan Xi Guan LiGuo, Qingsong (ren li zi yuan guan li) · First published 2001Open the Tome
Dang qian Zhongguo cheng zhen shi ye ren kou wen ti yan jiu =Qingsong Guo · First published 1999Open the Tome
