The Graded Chinese Syllables, Characters and Words for the Application of Teaching Chinese to the Speakers of Other Languages : National Standard: Application and Interpretation. - 中国国家对外汉语教学领导小组办公室; 教育部社科司汉语国际教育用音节汉字词汇等级划分课题组 (北京 : 北京语言大学出版社 Beijing Language and Culture University Press, 2010)