Traditional mechanical locks have gone through nearly a hundred years of history, and their functions and performance have almost been interpreted to the extreme. However, it still cannot meet the requirements of modern people for high reliability, high security, informatization and intelligence of locks. We began to apply new technologies to locks and designed electronic locks with rich functions to meet the needs of the market. Hong Kong Dragon Brothers Digital Lock Co., Ltd. was established in Hong Kong by Zhu Xilong, Luo Shifu and Luo Shizhong.