Time–distance diagrams along the filament (S2 slice shown in Figure 3a) in AIA 304 Å, in NVST Hα, in SUTRI 465 Å, and in CHASE Hα intensity images. They show bidirectional outflows during the filament evolution. The flow velocities are overlaid on the diagrams. The dashed magenta box represents the time range of SUTRI 465 Å, and the dashed blue box shows the time range of CHASE Hα in panel (b).