Dirty tricks are common. Halls booked for opposition party meetings become suddenly unavailable. Rallies and protest marches are easily banned, and smothered by riot police when they are not.

• 肮脏的伎俩随处可见。反对派突然被告知原本预定的开会地点无法使用；抗议集会被轻易取缔，如若不然防暴警察就要催泪弹伺候。