Model-fit component kinematics during April 5–11. Top panel: kinematics for all components. The center positions of different Gaussian components, and their uncertainties are color-coded (see legend). The Gaussian FWHM sizes are shown by dashed gray ellipses. The black cross at (0,0) indicates the kinematic reference (C0-0). Red arrows show the component motions; their lengths are proportional to the apparent velocities. Middle and bottom panel: same as the top panel, but zoomed in to the nuclear (C0) and extended jet regions (C1), respectively. We note that the center (0,0) in all panels is chosen as the center of C0-0, not the peak of total intensity.