1, Xi anqingyuan measurement and control technology co., ltd., main products: teaching instruments and equipment;
2. Nanjing Branch Ling Xing Teaching Instrument Co., Ltd., the main products: sales of teaching instruments, office supplies, electronic products and electrical products; Educational software research and development, sales, maintenance and technical services;
3. Zhengzhou Zhongcheng Experimental Equipment Co., Ltd., main products: laboratory equipment, precision instruments, electronic balances, ovens, acidity meters and microscopes; Laboratory equipment.