In Hong Kong, thousands of people have taken to the streets holding candles as they marched in memory of pro-democracy Chinese dissident Liu Xiaobo. Liu's ashes were buried at sea yesterday, depriving supporters of a place to pay tribute. Liu died on Thursday from cancer while in China's custody. Among the crowd was Lam Wing-kee, one of the five Hong Kong booksellers known for publishing salacious titles about Beijing politicians who vanished and resurfaced in the mainland in 2015.