RT Journal T1 A1 CA Shao-Hong, XIANG Qiu-Lan PB Journal of Guizhou University of Finance and Economics FD 2010-09-15 YR 2010 JF Journal of Guizhou University of Finance and Economics JO Journal of Guizhou University of Finance and Economics VO 28 IS 5 SP 18 DO K1 LK {https://gcxb.gufe.edu.cn/EN/article/article_8373.shtml}