Physical properties of the prominence-cavity MHD model from Y. Fan & T. Liu (2019), used for the forward modeling: (a) 3D magnetic field lines of the flux rope and the prominence condesation (represented by the purple temperature isosurface at 8 × 10⁴ K) supported in the dips of the flux rope field lines, viewed with the LOS for the forward modeling; (b) the LOS magnetic field; (c) the LOS velocity field; (d) the number density; and (e) the temperature in the plane of sky (POS) plane which corresponds to the central cross section of the flux rope; (f) the synthetic AIA 193 Å image produced by the MHD model with the perspective view of (a).