Omakangfu 2.5 non-regenerative switch, where is it?

Operation panel, no regeneration switch on OMACO Kangfu 2.5 operation panel. Regenerative switch is used to assist the catcher of particle filter to remove deposited particles, because particles will accumulate in the filter when the catcher works. When the particles accumulate to a certain amount, the power and economy of the engine will be greatly reduced, so it must be removed in time, otherwise it will affect the normal work.