  We present observations of interactions between the two filament channels of
different chiralities and associated dynamics that occurred during 2014 April
18 -- 20. While two flux ropes of different helicity with parallel axial
magnetic fields can only undergo a bounce interaction when they are brought
together, the observations at the first glance show that the heated plasma is
moving from one filament channel to the other. The SDO/AIA 171 A observations
and the PFSS magnetic field extrapolation reveal the presence of fan-spine
magnetic configuration over the filament channels with a null point located
above them. Three different events of filament activations, partial eruptions,
and associated filament channel interactions have been observed. The activation
initiated in one filament channel seems to propagate along the neighbour
filament channel. We believe that the activation and partial eruption of the
filaments bring the field lines of flux ropes containing them closer to the
null point and trigger the magnetic reconnection between them and the fan-spine
magnetic configuration. As a result, the hot plasma moves along the outer spine
line toward the remote point. Utilizing the present observations, for the first
time we have discussed how two different-chirality filament channels can
interact and show interrelation.
