Famous blogger on mainland Chinese political news, @yanghengjun, ran into a protest against the mainland Chinese official document on the practice  of “one country and two systems” in Hong Kong. As the document is called the White Paper, protesters dressed in white with white papers stuffed in their mouths, like Chinese ghosts:
吓死老子了！在铜锣湾最热闹的街上，突然碰上一队白衣白纸牵小白猪的集体散步者，缓慢行来，加上嘴里也塞满了白纸，万马齐喑，怪吓人的。。。走近一看，是反“白皮猪（书）“的，这个行为艺术搞得有创意，反正我是印象深刻！ pic.twitter.com/ReDyjq8j9k 
— 杨恒均 (@yanghengjun) June 24, 2014 
It scares me! In the most crowded downtown area of Causeway Bay, I ran into a group of people dressed in white, strolling around with some white pigs. Their mouths were filled with white paper. It was evening and the streets were dark, the scene was quite terrifying… I walked near, it was an art performance against the “White Pig (Book)” [The pronunciation of “book” is similar to the word pig in Cantonese.], it is very creative and has left a deep impression on me!