Insisting on innovation is our mission. Quality assurance is our life. Sticking to research and development by ourselves,to make product toolings of our own and to ensure the qualty maintaining the brand reputation. in order to be a hundred-yearbrand enterprise,Callone has invested tens of milions CNY to build an technology research and development center at all costsWe have a full set of testing equipment for gas appliances and gained nearly 30 patents.