Pro-Hong Kong umbrella vigil at the Frankfurt book fair Chinese dissident Liao Yiwu and former Hong Kong bookseller Lam Wing-kee urge European countries to step up support for Hong Kong's pro-democracy demonstrators, as they join an umbrella vigil at the Frankfurt book fair. Umbrellas are the symbol of the anti-government protest movement that has rocked the semi-autonomous territory in recent months, posing the biggest challenge to China's rule since the city's handover from Britain in 1997. IMAGES AND SOUNDBITES