There have been many queries on where to get some good fake stuff in Shanghai now that Xiangyang Market is shut.
There have been several contenders but it appears there are 2 major players, 1 in Puxi 1 in Pudong, these are:
Puxi - 580 Nanjing Xi Lu, close to Chengdu Lu. This is on the north side of Nanjing Lu up a wide set of steps, with two sets of double glass doors and it says something like "Fashion Mall" on the outside.
Pudong - Yatai Market which believe it or not, is in a Metro station. It is located at the Shanghai Science and Technology station on line 2. When you get out of the Metro just look around and you will see different entry points. It is a pretty big underground market and has many areas such as Area A, Area B etc.
They have the usual stuff including fakes of LV, Prada, Rolex, Gucci, Nike, Puma, Reebok etc etc.
Go explore - happy shopping!