Wo Hui Mandarin, our edtech company that is transforming the teaching and learning of Mandarin Chinese, is now the official partner of Chinese Test International (CTI)! CTI develops, administers and scores the HSK and YCT exams - China's only official tests of Chinese language proficiency for non-native speakers. Wo Hui Mandarin is now accredited by CTI, giving our students to access to their proprietary content through our app.