Deer technology was founded in beijing, china, in may 2014, and now has platforms in beijing, shenzhen, hangzhou, and chongqing to develop, develop, market and manufacture hardware, and to become the world's leading smart and defense technology company. With the smart door lock at its core, the company provides a solution to residential security for users around the world, namely, the national high technology enterprise, the ministry of industrial and technological technology, which has four major business blocks of domestic, commercial, overseas and ecological cooperation under the flag of deer and people technology. By 30 april 2022, equipment sales had cumulatively exceeded 8. 8 million units, and cumulatively over 21 million users of services had built 200 acres of modern security equipment estates, with an annual production capacity of 5 million units and a three-phase production capacity of 15 million units。