id	keyword
ch-6904	chinese
ch-6904	harvard
ch-6904	language
ch-6904	kunhua
ch-6904	kunhua ge
ch-6904	education
ch-6904	china
ch-6904	american
ch-6904	university
ch-6904	new
ch-6904	students
ch-6904	u.s
ch-6904	teaching
ch-6904	course
ch-6904	teacher