Fangda group is a well-known enterprise in the rail transit PSD industry in China. It has completely independent intellectual property rights, a rail transit PSD system with international excellent technical standards, and is equipped with excellent project management and construction teams. Fangda rail transit PSD system has won national, provincial and municipal scientific and technological innovation awards for many times, and its total patents and copyrights account for more than half of the industry. By 2022, Fangda PSD system has been applied in rail transit in 48 cities around the world, and more than 10 million people use Fangda PSD system every day.