The world first AP1000 Nuclear Power: our company has bid with domestic and international door manufacturing companies for 3 months and successfully achieved the design and manufacturing orders task of AP1000 oversized special shield doors item. In early 2008, our company with Shanghai nuclear engineering design institute and scientific research academy signed a cooperative development item with million using special doors. And the company has passed the twenty times test and research and development, bought more than 20 million production equipment and more more than 10 million experiment. Finally,the company conquered the multinomial technical difficulties and now enters into substantial trial production stage which also marks that our company strides forward another important step in the nuclear power equipment localization direction. We want to give good high-stand of AP1000 oversized shield doors localization quality.