In response to the crackdown, the Portuguese government immediately implemented a news blockade, Portuguese-language newspapers and magazines were banned, and newspapers in Portugal and overseas provinces were ordered to censor reports about the incident.
In response to the incident, the Chinese government deployed the People's Liberation Army to the Chinese-Portuguese Macau border to prevent Red Guards from invading Macau.
Four Chinese warships also entered the waters of Macau in response to the crackdown.
The security ring set around Macau by the Chinese would be involved in multiple casualty causing conflicts with Red Guards attempting to invade Macau by both land and by sea.

The pro-Beijing community in Macau adopted a "Three No's" approach as a means to continue their struggle with the Government — no taxes, no service, no selling to the Portuguese.
Representing Chinese Macau, was the pro-Beijing Struggle Committee against Portuguese Persecution, known locally as the Committee of Thirteen.
Chairman of the Committee was Leong Pui the leader of the pro-Beijing Macau General Association of Labour.

Negotiations to resolve and prevent further escalation began between the People's Republic of China, Committee of Thirteen, and the Portuguese government took place in Guangdong.
The chief negotiator for the Chinese was Ho Yin, whose involvement and commitment to resolve the crisis caused by the riot was crucial because at that time he was the only one who could contact directly both the Portuguese administration and Chinese officials in Guangzhou and Beijing, as he was the representative of Macau in the Legislative Council.

The Portuguese, due to increasing pressures from both Beijing and Lisbon, agreed to sign agreements with the Committee of Thirteen and the Guangdong Government Foreign Affairs Bureau and an official statement of apology and accepted responsibility for the events on December 3, 1966.
On January 29, 1967, the Portuguese Governor, José Manuel de Sousa e Faro Nobre de Carvalho, with the endorsement of Portuguese Prime Minister Salazar, signed a statement of apology at the Chinese Chamber of Commerce, under a portrait of Mao Zedong, with Ho, as the Chamber's President, presiding.
Alongside the apology, the Portuguese agreed to reinforce the role of the Macau Chinese business elite in running the governmental affairs of Macau, promised to never use force against the Chinese community of Macau, and agreed to pay reparations to the Chinese community in Macau to the sum of 2 million Macanese pataca as compensation for the eight dead and 212 injured.
On the contrary, the agreement signed with the Guangdong government was more favorable to the Portuguese, as per the agreement, the Chinese government would take back all refugees who arrived in Macau from 30 January 1967 on wards, a promise China would keep until 1978.

This marked the beginning of equal treatment and recognition of Chinese identity in Macau, and the beginning of de facto Chinese control of the territory with Chinese Communist Ho Yin becoming the de facto governor of Macau.
The Portuguese Foreign Minister, Alberto Franco Nogueira, described Portugal's role in Macau after 1967 as "a caretaker of a condominium under foreign supervision".
Chinese media described the political situation of Macau as a "half liberated zone".
Shortly after the agreements were signed, Chinese military forces around Macau were withdrawn and the Red Guard threat had subsided.
In response to the crackdown, the Portuguese government immediately implemented a news blockade, Portuguese-language newspapers and magazines were banned, and newspapers in Portugal and overseas provinces were ordered to censor reports about the incident. In response to the incident, the Chinese government deployed the People's Liberation Army to the Chinese-Portuguese Macau border to prevent Red Guards from invading Macau. Four Chinese warships also entered the waters of Macau in response to the crackdown. The security ring set around Macau by the Chinese would be involved in multiple casualty causing conflicts with Red Guards attempting to invade Macau by both land and by sea.
The pro-Beijing community in Macau adopted a "Three No's" approach as a means to continue their struggle with the Government — no taxes, no service, no selling to the Portuguese. Representing Chinese Macau, was the pro-Beijing Struggle Committee against Portuguese Persecution, known locally as the Committee of Thirteen. Chairman of the Committee was Leong Pui the leader of the pro-Beijing Macau General Association of Labour.
Negotiations to resolve and prevent further escalation began between the People's Republic of China, Committee of Thirteen, and the Portuguese government took place in Guangdong. The chief negotiator for the Chinese was Ho Yin, whose involvement and commitment to resolve the crisis caused by the riot was crucial because at that time he was the only one who could contact directly both the Portuguese administration and Chinese officials in Guangzhou and Beijing, as he was the representative of Macau in the Legislative Council.
The Portuguese, due to increasing pressures from both Beijing and Lisbon, agreed to sign agreements with the Committee of Thirteen and the Guangdong Government Foreign Affairs Bureau and an official statement of apology and accepted responsibility for the events on December 3, 1966. On January 29, 1967, the Portuguese Governor, José Manuel de Sousa e Faro Nobre de Carvalho, with the endorsement of Portuguese Prime Minister Salazar, signed a statement of apology at the Chinese Chamber of Commerce, under a portrait of Mao Zedong, with Ho, as the Chamber's President, presiding. Alongside the apology, the Portuguese agreed to reinforce the role of the Macau Chinese business elite in running the governmental affairs of Macau, promised to never use force against the Chinese community of Macau, and agreed to pay reparations to the Chinese community in Macau to the sum of 2 million Macanese pataca as compensation for the eight dead and 212 injured. On the contrary, the agreement signed with the Guangdong government was more favorable to the Portuguese, as per the agreement, the Chinese government would take back all refugees who arrived in Macau from 30 January 1967 on wards, a promise China would keep until 1978.
This marked the beginning of equal treatment and recognition of Chinese identity in Macau, and the beginning of de facto Chinese control of the territory with Chinese Communist Ho Yin becoming the de facto governor of Macau. The Portuguese Foreign Minister, Alberto Franco Nogueira, described Portugal's role in Macau after 1967 as "a caretaker of a condominium under foreign supervision". Chinese media described the political situation of Macau as a "half liberated zone". Shortly after the agreements were signed, Chinese military forces around Macau were withdrawn and the Red Guard threat had subsided.
12-3 incident