The authentic roast duck restaurants in Shanghai are:

1. Shanghai Quanjude Roast Duck Huaihai Store.

Address: 4th Floor, No. 786, Huaihai Middle Road, Shanghai.

2. Shanghai Quanjude Roast Duck Pudong Store.

Address: 3rd Floor, Purple Mountain Hotel, No. 778 Dongfang Road, Shanghai.

3. Shanghai Quanjude Roast Duck Zhabei Store.

Address: No. 547, Tianmu West Road, Shanghai.

4. Shanghai Duck King Xuhui Store.

Address: Second Floor, West Asia Hotel, No. 20 Tianyaoqiao Road, Shanghai.

5. Shanghai Ximen Roast Duck Restaurant.

Address: No. 168, Hongshan Road, Pudong New District, Shanghai.