The siren was placed on the roof of the Hanoi Mechanical Factory. During the resistance against the US, sirens had a function to alert the people and workers to hide safely and the combat forces to be in a combat-ready position.

On January 30th, 2023, Deputy Prime Minister Tran Hong Ha signed Decision No. 41/QD-TTg recognizing 27 national treasures (phase 11, 2022). These include the weapons collection of Giang Vo Military School, dating back to 15th - 17th centuries and which are conserved at the Hanoi Museum.

  In 1976, the Ninh Son tomb site (Ngoc Son commune, currently in Chuc Son town, Chuong My district, Hanoi) was discovered by chance during road construction. Then, the Ha Son Binh Department of Culture and Information conducted the excavation/ excavated.

Professor Duong Quang Ham grew up in a family with a tradition of Confucianism in Phu Thi Village, Van Giang District, Hung Yen Province. His great-grandfather, Duong Duy Thanh, used to work as a Provincial Education Commissioner in Hanoi. His father Duong Trong Pho, eldest brother Duong Ba Trac joined the Dong Kinh Nghia Thuc movement, and both were exiled to Con Dao.

51 years ago in December 1972, the US launched strategic air raids on Hanoi and major cities in the North with the hope of crushing the will of the Vietnamese people and forcing them to accept US conditions at the Paris Peace Talks. Over 12 days and nights the North Vietnamese army and people fought with determination to win the battle of the air. The victory "Hanoi - Dien Bien Phu in the air" forced the US government to declare a stop to bombing the North and sign the Paris Peace Accords.

On January 14th, 2015, the Prime Minister of Vietnam issued Decision No.53/QD-TTg, recognizing Vietnam National Treasures (Time 3) for 12 artifacts and groups of artifacts including the Thanh Mai bell. It was a great pleasure for all the staff of the Hanoi Museum.