He was in charge of the police operation code-named Tiderider in response to street protests triggered by the extradition bill since June 2019.

[14][15][16] Chris Tang reportedly transferred his mortgage of property in Southern District from HSBC to Bank of China (Hong Kong) three days before sanctions took effect.

[17] Tang was on a list issued by the US State Department on 14 October 2020, of ten individuals who materially contributed to the failure of the China to meet its obligations under the Sino–British Joint Declaration and Hong Kong's Basic Law.

[19] Also in April 2021, Tang criticized Apple Daily, stating that the pro-democracy newspaper was spreading fake news and inciting hatred in the city.

[28] In February 2023, Tang said that some visitors to prisons used their visits to "corrupt" youth and instill hatred of the Hong Kong government into them.

"[31] In July 2023, Tang said "Anyone who sees someone with weird facial expressions, muttering and looking ferocious, should notify the police as soon as possible"; the Security Bureau later said this was taken out of context.

[36] In addition, after the government announced bounties on 8 democrats outside of Hong Kong, Tang said one fugitive was a "modern-day Chinese traitor" and that the police would spend "a lifetime's endeavour to catch" them.

[37] Tang also wrote a letter to The Wall Street Journal after they released an editorial condemning the government's bounties, which said "It's also a reminder that China recognizes no international boundaries to its police state.

[40] According to Stand News, Tang sent a letter to Stephen Cheung, the president of the Education University of Hong Kong (EduHK), on 27 April 2020 requesting a follow-up to the speech of Choi Chun-wai (蔡俊威) on RTHK television programme Pentaprism II (左右紅藍綠).

Democratic Party Legislative Council member Ted Hui expressed concern and stated that he would send a letter to Civil Service Bureau to follow up on Tang's actions.

The independent regulatory agency of the Broadcasting Services, Communications Authority (CA), initiated an investigation and commented that "CHOI’s remarks had apparently been distorted, inaccurate information or personal opinions on the Internet without making clear the sources of information… The CA took the view that the host’s remarks made in the programme was irresponsible, and could be regarded as a hate speech with the effect of inciting hatred against the Police, unfair to and were capable of adversely affecting the reputation of the Police.

In September 2021, Tang claimed that the Hong Kong Journalists Association had infiltrated schools to spread anti-governmental political ideas.

"[49] In September 2022, Tang said that inmates who were arrested during the 2019–2020 Hong Kong protests and later convicted were being taught to understand China's history while in prison.

[50] In November 2022, Tang said that 2022 COVID-19 protests in China that take place in Hong Kong were a "a colour revolution" using "anti-China" social media, and may violate the national security law.

[52] In September 2021, Tang said that the Hong Kong Alliance in Support of Patriotic Democratic Movements of China was a foreign agent, but did not provide any evidence or proof.

[58] In May 2023, Tang refused to answer a reporter's question, who asked if mourning victims of the Tiananmen Square massacre would violate the national security law.

[59] Later in May 2023, Tang said "It will be a special occasion in a few days' time, many people will use this special occasion to commit acts endangering national security, such as promoting Hong Kong independence and intending to commit subversion," without directly naming the Tiananmen Square massacre event or the people involved with endangering national security.

[60] In response to the Pillar of Shame, Tang in August 2023 claimed that people who seek to endanger national security usually engage in acts under the disguise of "peaceful advocacy" or "artistic creations.

[62] In September 2021, Tang claimed that celebrations for the Republic of China's Double Ten day could risk breaching the national security law.

[63] Many precursors to the Republic of China were based in Hong Kong, including places along the Dr Sun Yat-sen Historical Trail.