A protester holds placards at a pro-democracy rally next to the Hong Kong government complex on August 31, 2014.

Hong Kong is bracing for pro-democracy protests after Beijing slammed the door on electoral reforms on Sunday, fanning fears of potential economic fallout in the Asian financial hub.

Following a week-long general meeting, the Standing Committee of China's National People's Congress announced on Sunday that it will only allow two or three candidates with majority backing from a nominating committee to run in Hong Kong's 2017 leadership vote.