Shanghai 3M Auto Sales After-sales Product Technology Training Center is a training center specially established by 3M Company in China for the auto sales after-sales market. Located at No. 258, Jiabayi District Road, Shanghai. The project needs to build a deck plane on the balcony outside the training classroom to become a landscape resting platform for employees to relax in their daily life. Shanghai 3M Auto Sales After-sales Product Technology Training Center is a training center specially established by 3M Company in China for the auto sales after-sales market. Located at No. 258, Jiabayi District Road, Shanghai. The project needs to build a deck plane on the balcony outside the training classroom to become a landscape resting platform for employees to relax in their daily life. Making a plane in this way can firstly increase the usable area of the building, secondly, it can beautify the appearance of the building, and cover the imperfect parts of the building as shade, and most importantly, cracks can appear after prolonged exposure to the sun.