Pro-China supporters celebrate with Chinese flags after China's parliament passes national security law for Hong Kong, in Hong Kong, China June 30, 2020.

Police officers stop and search demonstrators during a protest after China's parliament passes a national security law for Hong Kong, in Hong Kong, China June 30, 2020.

Carrie Lam, chief executive of Hong Kong, addresses by video link the 44th session of the Human Rights Council at the European headquarters of the United Nations in Geneva, Switzerland, June 30, 2020.

A pro-democracy protester holds a placard that reads ''Against the national security law. March on July 1'' during a protest after China's parliament passes a national security law for Hong Kong, in Hong Kong, China, June 30, 2020.

Carrie Lam, chief executive of Hong Kong, addresses by video link the 44th session of the Human Rights Council at the European headquarters of the United Nations in Geneva, Switzerland, June 30, 2020.

Riot police patrol at a shopping mall during a protest after China's parliament passes national security law for Hong Kong, in Hong Kong, China June 30, 2020.

Police officers ask people to leave during a protest after China's parliament passes a national security law for Hong Kong, in Hong Kong, China June 30, 2020.

Carrie Lam, chief executive of Hong Kong, addresses by video link the 44th session of the Human Rights Council at the European headquarters of the United Nations in Geneva, Switzerland, June 30, 2020.

Pro-China supporters celebrate with champagne and Chinese flags after China's parliament passes national security law for Hong Kong, in Hong Kong, China June 30, 2020.

Hong Kong Chief Executive Carrie Lam attends a news conference ahead of national security legislation, in Hong Kong, China June 30, 2020.

Pro-China supporters celebrate with champagne after China's parliament passes national security law for Hong Kong, in Hong Kong, China June 30, 2020.

Pro-China supporters celebrate with Hong Kong and Chinese flags after China's parliament passes national security law for Hong Kong, in Hong Kong, China June 30, 2020.

Riot police patrol at a shopping mall during a protest after China's parliament passes a national security law for Hong Kong, in Hong Kong, China June 30, 2020.

Carrie Lam, chief executive of Hong Kong, addresses by video link the 44th session of the Human Rights Council at the European headquarters of the United Nations in Geneva, Switzerland, June 30, 2020.

Pro-China supporters celebrate with champagne after China's parliament passes national security law for Hong Kong, in Hong Kong, China June 30, 2020.

Hong Kong Chief Executive Carrie Lam attends a news conference ahead of national security legislation, in Hong Kong, China June 30, 2020.

Hong Kong Chief Executive Carrie Lam attends a news conference ahead of national security legislation, in Hong Kong, China June 30, 2020.

A pro-China supporter celebrates with champagne after China's parliament passes national security law for Hong Kong, in Hong Kong, China June 30, 2020.

Pro-China supporters celebrate with champagne after China's parliament passes national security law for Hong Kong, in Hong Kong, China June 30, 2020.

Pro-democracy protesters take part in a protest after China's parliament passes a national security law for Hong Kong, in Hong Kong, China June 30, 2020.

Pro-democracy protesters observe a minute of silence during a protest after China's parliament passes a national security law for Hong Kong, in Hong Kong, China June 30, 2020.

Carrie Lam, chief executive of Hong Kong, addresses by video link the 44th session of the Human Rights Council at the European headquarters of the United Nations in Geneva, Switzerland, June 30, 2020.

Pro-China supporters celebrate with Hong Kong and Chinese flags after China's parliament passes the national security law for Hong Kong, in Hong Kong, China June 30, 2020.