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>Local warned, they dont want protesters in their area, if they come back ,YL locals will teach them a lesson about not to invade into others' community. but protesters took it as a challenge to their righteousness and claim they will 'liberal' Yuen Long.

That is not what happened. They took it as a challenge after they were beaten up. No one did anything to Yuen Long, and they decide to beat any everyone, from Child to Pregnant Woman on the Western MTR Train.