The pro-democracy business mogul spoke to the BBC shortly before his arrest on fraud charges.
2014 Hong Kong protests
By Preeti Jha
Joshua Wong believes he is now being followed, after the new security law was passed by China.
The president signs an order and bill targeting China for "extinguishing Hong Kong's freedom".
The biggest distributor of luxury goods in Asia has called on landlords in Hong Kong to help ease the burden of slumping sales caused by six months of civil unrest.
Bluebell Group, which distributes a huge number of high end brands such as Christian Dior perfumes, Balmain and Anya Hindmarch, has asked shopping mall owners to make major cuts to rents, warning a collapse in tourist spending risks pushing retailers out of business.
The company's chief executive Ashley Micklewright told the South China Morning Post that sales in some of its shops have plummeted by as much as 60 percent.
Official figures published this week showed that retail sales saw their biggest ever monthly fall in October, sliding by 24.3%, while the ongoing protests have already pushed the economy into its first recession in a decade.
Hong Kong police say the water cannon "accidentally" hit the mosque while firing at protesters.
By Cindy Sui
BBC News, Taipei
"President Trump, please save Hong Kong" and "make Hong Kong great again" were among the banners.
Voices from Hong Kong as thousands of people hold another day of pro-democracy protests.
A month since the raiding of the government’s Legco building in Hong Kong, three protesters detail how they view it as a turning point in the current political movement