Beijing Jingyi North Instrument Co., Ltd. Beijing Jingyi North Instrument Co., Ltd. (formerly Beijing No.3 Electric Meter Factory) is the earliest professional enterprise that produces electric meters in China. Founded in 1977, it was restructured into Beijing Jingyi North Instrument Co., Ltd. in 2003. Beijing Jingyi North Instrument Co., Ltd. is a national high-tech enterprise integrating R&D, production, sales and service of intelligent measuring instruments and supporting intelligent energy management systems.