| Inductive label | Keywords |
| Teacher’s language ability | Mandarin, English, pronunciation, voice, etc | Personal qualities | Appearance, dress, pretty, decent, cool, amiable, etc | Relationship between teachers and students | Respect, care, love, abuse, coercion, etc | Professional quality | Knowledgeable, professional, skilled, dry goods, etc | Teaching attitude | Serious, responsible, careful, etc | Course assessment, assessment difficulty, etc | Check-in, final, exam, paper, point arrival, etc |
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