China Ningbo Yong Jing Science and Education Equipments Co., Ltd. was Founded in 1970, specializes in procucing teaching equipments, refractometer, portable refractometer used in primary and high school education, with a variety of several hundreds of types of teaching materials and equipments, especially for biology, chemistry, physics and earth science, etc.We have overseas customers all over the world, more than 50% of our products are for export. Most of our teaching equipments exported to USA, Europa, South Asia, and Middle East. Our Ltd has a well educated technican team, with a strong power of designing and developing. Any new products, refractometer, portable refractometer are warmly welcomed to develop. In order to give everyone an education chance, please come give us your advice and accept our sincerity in cooperation with you.