The official document is as follows, please refer to the attachment:

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Subject: Regarding the use of Traditional Chinese characters in Chinese language teaching for overseas students in all levels of schools in our country, please cooperate with your school, please check and be informed.
Explanation:
1. In accordance with the Ministry of Education, Department of Elementary and Secondary Education, letter No. Tai Jiao Guo Shu Yuan Zi Di 1150067266 dated July 23, 115.
2. The Ministry of Education has been promoting Traditional Chinese characters as an important policy since 92 years ago, and has been continuously promoting Chinese language teaching with Traditional Chinese characters externally, in order to highlight the cultural characteristics of our country and inherit the cultural connotation of Traditional Chinese characters.
3. In order to maintain the consistency of Chinese language teaching and the learning environment of Traditional Chinese characters, please use Traditional Chinese characters as the basis for teaching and learning when your school offers Chinese language teaching courses for overseas students (including foreign students, overseas Chinese students, and students from Hong Kong and Macau).