Baoding Earth Science & Technology Co., Ltd. (EST), which belongs to China JIUJIU Group, is a high-tech enterprise registered in the national high-tech zone. The company is specializing in producing and developing geophone, cable, seismic exploration instrument etc, and has an Engineering Department of over 30 years combined experience. It utilizes the latest technology, equipment and most advanced techniques to ensure that all the products offer consistent quality. Its annual production of geophone is over one million pieces.