This study examines the syntactical differences between grammaticalized complements and general complements in Mandarin Chinese. Focusing on four directional complements-shang 上 (up), xia 下 (down), qi 起 (rise), and chu 出 (out)-we investigate the grammaticalization of these directional complements in light of image schemata (Talmy 1988, 2000) and aims to review Heine, Claudi & Hunnemeyer's (1991) proposal of grammatical structure. The result shows that the grammaticalization of directional complements can be written as space movement ⇒ space → non-specific space → time → status, which is generally in accordance with the grammatical structure proposed by Heine, Claudi & Hunnemeyer (1991). However, the additional step of space → non-specific space can be observed in the directional complements of modern Chinese.