This study illustrates one affective function of Mandarin right-dislocation found in activity oriented interactive discourse by 7-year-old children. The study first illustrates that Mandarin right-dislocation is a grammaticalized device characterized by a set of consistent syntactic and prosodic features, rather than a repair device previously labelled as afterthought. Then the study shows that Mandarin right-dislocation has developed an emphatic function to focus the addressee's attention on the concerned person or object, especially when they are assigned to the topic slot and thus assume the presupposed information status. Furthermore, this emphatic function has a stable association with negative evaluations by the speaker. The combination of the emphatic function and negative evaluation is characterized as the intensifying function.