- Constructing traffic, irigation, civil, industrial, port, waterway, public facility, water supply - sewerage, and electrical structures.

- Setting up and trading small to medium sized electricity generating factories, for-civil-purpose structures, amusement parks.

- Leasing housing, land, warehouse, factory (except real estates).

- Construction consulting.

- Designing bridges.

- After-construction consulting and inspecting.

- Outsourcing steel structures, construction materials and other mechanic products.

- 17 August 1952: Bridge Key Team No.2 was established as the first Vietnamese bridge builder in Mai Chau, Hoa Binh;

- 1977: Renamed as Bridge Enterprise No.12;

- 1993: Renamed as Bridge Company No.12;

- September 2007: Renamed as Bridge Joint Stock Company No.12 - Cienco 1;

- 01 October 2007: Put into operation under the model of a joint stock company with a charter capital of VND48.5 billion under the business registration certificate No.0100104651 issued by Hanoi Department of Planning and Investment;

- 26 December 2016: Traded on UPCOM market;

- 22 June 2017: Renamed as Bridge Joint Stock Company No.12;