The Certificate for Teachers of Chinese to Speakers of Other Languages (国际汉语教师证书Guójì hànyǔ jiàoshī zhèngshū) is a standardized Chinese language proficiency test for those aspiring to teach Chinese as a second language. CTCSOL aims to ensure that Chinese language educators/ tutors are professionally competent in teaching Chinese language, history, and culture and are aware of teaching methodologies, classroom management, lesson planning, and ethical conduct.

A CTCSOL certificate increases the credibility of any Chinese language instructor, coach, or tutor. It maximizes the employability of those seeking opportunities to teach the Chinese language to non-native speakers.

CTC is the only Chinese Language Proficiency Certificate that the Centre for Language Education and Cooperation (CLEC) approves for teaching in Confucius Institutes that are established worldwide. A CTCSOL certificate is proof of the highest level of knowledge of the Chinese language and enhances accessibility to ample opportunities. CTCSOL includes both a written exam and an interview.