First opening of revolutionary relic Co Ci tunnel

Located in the Thang Long Imperial Citadel, the Secret Tunnel, which once kept the information flow of the General Staff during the resistance war against America, was opened for the first time.

The revolutionary relic of the Cipher Tunnel - General Staff Headquarters in the Thang Long Imperial Citadel heritage site opens to visitors for the first time.

The project began on February 10, 1966 and was completed on June 30 of the same year, with an area of ​​over 37 square meters. The bunker played a particularly important role, helping the General Headquarters of the Vietnam People's Army maintain direction, management, and command of the military branches and fronts in the conditions when Hanoi was bombed by the US Air Force. The bunker was used most in December 1972 - the time when the US Air Force bombed Hanoi and Hai Phong most fiercely.

The entrance to the cellar is a staircase with an iron handrail. The cellar was restored with the principle of respecting and not interfering with the original monument.

The doors and frames are made of solid iron at the two entrances to the basement.

Ventilated, filtered, purified, naturally ventilated room. The ventilation system ensures the necessary amount of air when closed, prevents toxic vapors from seeping in from the outside and air from leaking out, creating excess pressure inside the fortification.

Gravel wave exhaust room. Ventilation system includes: Gravel wave exhaust room, fine dust filter, toxic filter, toxic release lock, fan, air adjustment leaf, soundproof box, flow meter, automatic exhaust door and gravel wave exhaust room.

The cellar consists of two separate rooms with connecting doors and a ceiling about 2 m high.

The rooms are displaying many artifacts related to the period of the war against America.

Officers and staff of the Code Translation Department, Cipher Department - General Staff take a photo in front of the Code Translation Department in February 1972.

Many seals and telegrams with the "Secret" stamp were used during the resistance war against America.

Household items of the Code Department officers from 1968 to 1992.

The explanation uses technology to create an impression that attracts visitors, especially young people.

The tunnel has an entrance and an exit 50 meters apart. The Cryptographic Tunnel is open to visitors as part of a series of activities to celebrate the 80th anniversary of the August Revolution and National Day, September 2.

Source: https://baohatinh.vn/lan-dau-mo-cua-di-tich-cach-mang-ham-co-yeu-post294085.html