Most read on SCMP.com this week HONG KONG Pro-democracy protests that appeared to be dwindling were reignited on Wednesday by footage which appeared to show plain-clothes police officers beating an unarmed and restrained protester, who was later identified as Civic Party member Ken Tsang Kin-chiu. CHINA Mainland scientists who have invented an "invisible umbrella" say it can shield the user from rain, wind, snow and even pepper spray. HONG KONG "Tonight I stand by you, because you are doing what I never dared to dream," said a mainland writer in an open letter to the students demonstrating for democracy. HONG KONG Chief Executive Leung Chun-ying said on Sunday protesters had "almost zero chance" of forcing Beijing to drop its rules for the 2017 election. HONG KONG The Occupy Central movement has taken an emotional toll on police officers, said the force's psychologists. "I've been in the police for so many years but I've never seen a time when colleagues cry every day," said clinical psychologist Alison Mak Lai-ping. Featured video of the week Going behind the camera In 1991, at the height of her fame, actress Cherie Chung Chor-hung turned her back on a dazzling film career. Two decades later she is making a name for herself as a photographer.