"We will stand here, we will take action, until they respond to us...together we have more power," 20-year-old student Harley Ho told Associated Press.
The protesters other demands include the unconditional release of prisoners, the government withdrawing the word "riot" to classify protests, an independent probe into police behavior, and universal suffrage.
Since early June, Hong Kongers have held weekend protests against what they consider undemocratic policies by China.
On Tuesday, protesters blocked passengers from boarding flights at the city’s airport and later assaulted two men they accused of being Chinese spies.
- Fears grow of Chinese military intervention
- Beijing accused of using triad gangsters against Hong Kong protesters
#香港人加油 #HongKongProtests #antiELAB Peaceful rally in Victoria Park by hundreds of thousands of HKers. Democracy for Hong Kong. Withdraw the Extradiction Bill. Independent inquiry into Police Brutality. Retweet and share the peaceful movement with the world. pic.twitter.com/rP85wCM9UfA Girl from HK (@girlinhk) August 18, 2019
Protest organiser Bonnie Leung said they hoped this Sunday's protest would take place without incident.
"We hope we can show the world that Hong Kong people can be totally peaceful," she said before the protest, adding that it would be the responsibility of the police if there was any chaos.
Violent clashes between police and hard-liners have regularly occurred after peaceful demonstrations.