In this paper, I argue that composite probing by the composite probe [A+Ā] is generally observed in Mandarin, in the sense that multiple heads projected in the low IP area host the composite probe [A+Ā], and that the Voice head, as a phase head, generally hosts the composite probe [A+Ā] for purposes of successive-cyclic movement. The evidence comes from two types of topicalization and focalization in Mandarin, which exhibit mixed A/Ā-properties. Specifically, I argue that IP-internal topicalization and focalization involve successive-cyclic composite A/Ā-movement via Spec, VoiceP, which terminate at IP-internal Spec, TopP and Spec, FocP, respectively, while IP-external topicalization and focalization can involve intermediate steps of composite A/Ā-movement to Spec, VoiceP, followed by a terminating step of Ā-movement to IP-external Spec, TopP and Spec, FocP, respectively.