<p>The behavior of liquid drops contacting a solid surface in an immiscible liquid is critical across various applications, notably within the rapidly advancing field of embedded 3D printing. However, the influence of the surface wetting condition and the viscous surrounding liquid on the contact of the drop remains unclear. Here, the contact process of water drops on hydrophilic and hydrophobic surfaces has been observed using an interference method. In contrast to rapid spreading on a hydrophilic glass surface, a drop on a hydrophobic PDMS surface displays a distinctive multi-point contact mode, leading to the entrapment of the surrounding liquid. The underlying mechanism is the Rayleigh-Plateau instability of the water/oil interface, and the slow spreading of the contact line on a hydrophobic surface is also a necessary condition. This study not only elucidates the distinct contact mode of drops under varying surface wetting conditions, but also contributes to the improvement of embedded 3D printing technology.</p> Graphical Abstract <p></p>