As protests against Xi Jinping’s Zero-COVID policy spread across China’s diverse cities and regions over the last week, one symbol remained constant: a blank sheet of paper. It has become so pervasive that, online, people have begun referring to the protests in China as the “A4 revolution”—a reference to the standard paper size used in printers—or "white paper revolution." Many observers have described the paper as a representation of everything protesters wish they could say but cannot. It presents authorities with a difficult conundrum: arrest people for saying literally nothing at all or allow a simple act of resistance to proliferate unchallenged. In the social media age, the blank sheet has the added benefit of being difficult for online censors to quickly block at scale without accidentally censoring many other innocuous images or videos. Tap the link in our bio to read more. Photograph by Thomas Peter—@reuters