Calin, as derived from China League of Innovation, dates back to the year 2006 when our team developed the new generation of CPU card electronic prepaid kilo-watt hour meter for China State Grid. Now there are over 1,000,000 pcs this type of smart prepayment electric meters operating as key revenue protection devices for utilities and service providers in and out of China. Each member of Calin R&D team ever served in top rank Chinese meter companies and contributed to the rapid development