Thousands of people joined the protest organized by Thai high school students to call for education reform and oppose the government.
The large-scale protest took place in the capital Bangkok today despite Thai Prime Minister Prayuth Chan-ocha on November 19 warned that it would "use all laws" to fight protesters.
"We came to demand freedom as well as educational reform. We want a real constitutional monarchy," said Mameaw, an 18-year-old high school student who joined the protest.
Thai police said the "Bad Student" student group protests could continue, despite two of the teenage leaders in the group that were summoned on November 20 for involvement in the previous protest.
However, Thai students also actively organize protests to seek freedom and equity in the educational system they consider "old fashioned".
Thai government spokesman Anucha Burapachaisri said Prime Minister Prayuth expects the protesters to exercise their freedom constructively and in compliance with the law.
Protesters are planning to hold a massive rally at the Royal Assets Department on November 25 to protest King Vajiralongkorn's private management of the tens of billions of dollars worth of assets.
The Royal Palace did not comment on the protests, but King Vajiralongkorn recently called Thailand "a land of compromise", a phrase criticized by protesters.