The solar energy product exhibition was held during the SWC period. It exhibited the domestic and foreign newest technology and product in renewable energy realm. There were 95 exhibitors, which were all the famous enterprises in the industry. Heat preservation technology became the exhibition theme for thermal using enterprises.

What were different from the exhibitions before were that all the exhibitors promoted the new products which possessed heat preservation technology ， because it had become the theme to all the solar water heater enterprises attended the exhibition. It means that after Sunrain invented and promoted heat preservation products, the technology then reached a consensus. On the occasion that SWC 2007 being held in China , all enterprises promoted the heat preservation solar water heaters, which means the technology had passed the transition from “Heat Absorption Times” to “Heat Preservation Times”, also means another favoring technology upgrade for solar water heater industry.

Sunrain group, which takes lead in promoting heat preservation technology, aroused the extreme interest of domestic and foreign experts and clients. The staff member needed to receive tens of consulting experts and businessmen. They asked for technology material one after another, and detailed explanation before the demonstration. It means that the heat preservation technology not only becomes the domestic developing trend, but also gains the international approve, further establishes China solar energy's powerful position on the international industry.