In Hong Kong in order to protect the identify of a suspect, the police use a black bag with two eyeholes to cover the suspect's head when they take him out of the police station.
喺香港為咗隱藏疑犯嘅身份，警察帶佢出去差管時會用個有兩眼窿嘅黑袋笠住佢嘅頭。