Protestors stand next to a U.S. flag as they attend a gathering at the Edinburgh place in Hong Kong, China, November 28, 2019. US flags were flying in Edinburgh Place, Hong Kong this evening by the protesters as a celebration and thank you note for the US's Human Rights and Democracy Act, which was signed by President Trump earlier. REUTERS/Marko Djurica

A protester holds a U.S. flag as they attend a rally at Edinburgh place in Hong Kong, China, November 28, 2019. US flags were flying in Edinburgh Place, Hong Kong this evening by the protesters as a celebration and thank you note for the US's Human Rights and Democracy Act, which was signed by President Trump earlier. REUTERS/Leah Millis

Protesters holding U.S. flags attend a rally at Edinburgh place in Hong Kong, China, November 28, 2019. US flags were flying in Edinburgh Place, Hong Kong this evening by the protesters as a celebration and thank you note for the US's Human Rights and Democracy Act, which was signed by President Trump earlier. REUTERS/Leah Millis

Protestors light their smartphones as they attend a gathering at the Edinburgh place in Hong Kong, China, November 28, 2019. US flags were flying in Edinburgh Place, Hong Kong this evening by the protesters as a celebration and thank you note for the US's Human Rights and Democracy Act, which was signed by President Trump earlier. REUTERS/Marko Djurica

Protestors sit next to a U.S. flag as they attend a gathering at the Edinburgh place in Hong Kong, China, November 28, 2019. US flags were flying in Edinburgh Place, Hong Kong this evening by the protesters as a celebration and thank you note for the US's Human Rights and Democracy Act, which was signed by President Trump earlier. REUTERS/Marko Djurica

Protestors wave U.S. flags as they attend a gathering at the Edinburgh place in Hong Kong, China, November 28, 2019. US flags were flying in Edinburgh Place, Hong Kong this evening by the protesters as a celebration and thank you note for the US's Human Rights and Democracy Act, which was signed by President Trump earlier. REUTERS/Marko Djurica