Sany Group Co Ltd is a multinational group based in Changsha, Hunan, China. It was founded in 1989. It is the largest and the world's fifth largest construction machinery manufacturer in China. It is also the world's largest manufacturer of concrete machinery.

The 31 group business involves the manufacturing fields of concrete machinery, mining machinery, lifting machinery, pavement machinery, coal machinery, port machinery, marine engineering and other equipment manufacturing fields. The company owns two listed companies with Sany (SH, 600031), 31 international (HK, 00631), and 31 port machines and 31 marine heavy workers at the same time. Unlisted assets such as 31 heavy energy. Through Sany, the group is also fully owned by Putzmeister, the world's first brand of concrete machinery, and Austria Pal Feig (Palfinger), a global hoisting machinery giant.

At present, the 31 group has built industrial parks in Changsha, Beijing, Shanghai, Shenyang, Kunshan, Urumqi, Loudi and other places. There are R & D manufacturing centers in India, the United States, Germany and Brazil, covering more than 100 countries and regions in the world.

The name of the 31 group comes from the vision of "creating first-class enterprises, creating first-class talents and making first class contributions" at the early stage of entrepreneurship. Over the years, 31 has been committed to "contributing to the quality of the world" and is committed to contributing a world-class brand to the Chinese nation.