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Foes. most were wearing masks aimed at hiding identities from authorities. 13 people were arrested. we saw a few detained. with legal efforts to block the ban so far failing, hong kongers were speaking out. take a listen. i see you have a face mask on? >> yes. because hide face. reporter: you dont care, you will not take the mask off? >> yeah, yeah. reporter: you dont care what the government says? >> it is okay. it is fine. for democracy. reporter: for democracy? >> yes. reporter: what is seen ...