- Investment consultancy.

- Trade promotion and brokerage.

- Levelling for construction works.

- Construction of civil and industrial works.

- Goods and passengers transportation.

- Inbound and outbound tourism and other related services.

- Real estate brokerage and business.

- Mining, processing, and marketing minerals.

- Environment  service business.

- Others under business license.

- In February 2006: Duong Quan Company Ltd, the precursor of Tai Nguyen Corporation, was established with initial charter capital of VND3.6 billion;

- In August 2006: the company renamed to Tai Nguyen Investment and Consultancy Company Limited, main business were real estate brokerage and mining consultancy services;

- In July 2007: the company changed to joint stock company with charter capital of VND15 billion;

- In June 2008: the company renamed to Tai Nguyen Corporation and hiked charter capital to VND30 billion;

- In 2008: hiked charter capital to VND40 billion through private placement;

- In 2009: The lead zince ore at Mun Chung, Xa Nhe, Dien Bien finished investment phase and started operation and generating revenue;

- In June 2009: hiked charter capital to VND85 billion through private placement;

- In December 2009: the company was recognized as a public company;

- In May 2010: the company debut shares on Hochiminh Stock Exchange (HOSE).

- February 01, 2016: Increased charter capital to VND255 billion;

- May 06, 2021: Renamed as TNT Group;

- October 22, 2021: Renamed as TNT Group Joint Stock Company;