According to Baidu Encyclopedia, Yi Group was founded in 1989 and successfully listed on Shenzhen Stock Exchange in 20 14. It ranks among the top 500 global new energy enterprises and innovative enterprises 100. It is a key high-tech enterprise of the National Torch Plan, a national technological innovation demonstration enterprise and a national intellectual property demonstration enterprise. He has undertaken more than 20 major national, provincial and municipal projects and drafted more than 20 national and industry standards. More than 800 patents have been authorized, more than 50 software copyrights/kloc-0 have been obtained, more than 70 independent core technologies have been owned, and an advanced R&D and intellectual property innovation system has been built. Digital energy products and solutions are widely used at home and abroad and are well received.