2019–2020 Hong Kong protests, also known as the Anti-Extradition Law Amendment Bill movement. Started in June of 2019. It was a series of protests against the bill by the Hong Kong government.

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On 16 June, just one day after the Hong Kong government suspended the bill. A bigger protest occurred to push for complete withdrawal and reaction to the excessive force used by police during the protests. Moreover, on July 12, 2019, and August 31, 2019, incidents escalated the protests.

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Lam withdrew the bill on 4 September but refused to concede the other four demands. A month later, she invoked the emergency powers to implement an anti-mask law.

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Protest going on throughout end of 2019 to early 2020. However, COVID-19 pause the protests. Tensions mounted again in May 2020 after Beijing decided to promulgate a national security bill for Hong Kong before September.

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National Security Law

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Article 23 of Hong Kong's Basic Law states that Hong Kong Special Administrative Region will "enact laws on its own" for the Region's security and to prevent political bodies outside the Region from "conducting political activities in the Region" or otherwise interfering with Hong Kong's independent security:

 

The Hong Kong Special Administrative Region shall enact laws on its own to prohibit any act of treason, secession, sedition, subversion against the Central People's Government, or theft of state secrets, to prohibit foreign political organisations or bodies from conducting political activities in the Region, and to prohibit political organisations or bodies of the Region from establishing ties with foreign political organisations or bodies.

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