Changzhou Longquan Solar Energy Manufacture Factory is a hi-tech enterprise specializing in the research and development of solar water heaters, electric generators and other optical products. Most of our products have been exported to European countries. In order to explore world market and increase market competitive force and expand business scope, our company has invested more on technique and hire many specialists in this field. At present, our company possesses 20,000-square-meter factory building and 18 vacuum tube and titanium alloy super tube production lines, more than 100 technical persons, over 50 administrative staff and more than 1,000 employees. The annual production capacity of solar water heater comes to 200,000 sets. The company has overall carried out the ISO9001 quality assurance system. Since 2004, we have introduced 18 full-automatic glass vacuum heat-collective tube production lines and 30 specialized technical persons. It has formed the production capacity of producing one vacuum per six seconds and annual output of 6,000,000 sets with sizes of φ47x1.5m, φ47x1.6m, φ58x1.8m, φ58x2.1m, and φ70x2.1m. The products have been supported for many brands of solar energy equipment.