On October 16, 2009, the 7th China International Roofing and Building Waterproofing Technology Exhibition was successfully concluded. The exhibition has more than 180 exhibitors from all over the world. Professional seminars, architects special seminars and all kind of lectures have been held during the exhibition. The waterproof association from United States, Germany, Japan and other countries sent a large delegation, the number of people and exhibition size are the highest over the years.