Students attend a rally to call for political reforms outside City Hall in Hong Kong on Aug. 22: "A certain amount of pessimism" has spread among residents, says a leading expert on China in Germany.
Kai Pfaffenbach/ Reuters

Students attend a rally to call for political reforms outside City Hall in Hong Kong on Aug. 22: "A certain amount of pessimism" has spread among residents, says a leading expert on China in Germany.