I am in Shanghai. where can I get good quality popular brand bags?

For retail quality brand bags, I suggest you go to the large shopping centers like Grand Gateway 66 Plaza at No. 1, Hongqiao Road (near Huashan Road), Xuhui District, and Metro City at no. 1111, Zhaojiabang Road, Xuhui District.

Aaprt from that, China Pilot Free Trade Zone is a good choice. At Sunland, you will find many top-level branded bags like Gucci, Givenchy, and Armani. The price is reasonable. It is located at no. 628, Qihang Road (near North Zhangyang Road).