从本期开始,本刊编辑部进行新老交替。原编辑部主任叶文平,副主任宋永俊、赵俊宏因顺利完成在中国人民大学的学业,已经离开在本杂志社的工作岗位。在任期间,他们为本刊的成长和编辑部的发展作出了很大贡献,本刊对他们表示衷心的感谢! From the beginning of this issue, the editorial department of our magazine alternates between new and old. Ye Wenping, former director of the editorial department, Song Yongjun and Zhao Junhong, deputy directors, completed their studies at Renmin University of China and have left their posts in the magazine. During their tenure, they made a great contribution to the growth of the magazine and the development of the editorial department. The magazine expresses its heartfelt thanks to them.