HangZhou ZhongGang Construction Engineering Ltd. is a professional enterprise to the rapid repair of concrete technology research. The company has a patented technology of Tongji University and had developed Repair Wang materials on the basis of practice and application for years. The repair wang materials’ strength has reached 30MPa for 1 hour and 50MPa and above for 7 days. It has stable quality and high durability. It has been widely used in airports, bridges, factories and mines, such as repair of damaged concrete, and created a favorable economic and social benefits.