@@ This study focuses on the acquisition of wh-questions in Mandarin Chinese-speaking children with Specific Language Impairment (SLI). Many studies done in English-speaking children with SLI have demonstrated that children with SLI have special difficulties in the use of object wh-questions compared with subject wh-questions. It is reported that the longer grammatical movement undergone in object wh-questions is responsible for this difficulty. As Chinese is a wh-in-situ language, our study intends to examine whether there is also an asymmetry in the acquisition of wh-subject and wh-object questions in Mandarin Chinese-speaking SLI children by investigating the acquisition of wh-questions in three groups of children—12 SLI children, 12 typically developing children matched on age, and 12 typically younger children matched on MLU.