Credit to /u/rufustank for this fantastic, comprehensive list of wholesale markets in Shanghai. Click here for the original /r/shanghai thread and click here for the November 2014 updated edition.

These wholesale markets are places populated by tens or hundreds of shops selling products at wholesale prices. They are typically crowded, cluttered, congested, and crazy and you've got to hunt through them to find what you need. 批发市场

Imported Wholesale FoodsEdit

1255 Lianhua Rd, Minghang District 闵行区莲花路1255号

Mix of imported and local foods including: dairy products (butter, cheese, etc), baking ingredients, all nuts, spices, condiments, flours, canned goods, sugars, chocolates, etc. This is the place to go. The imported American, European, Indian, and other goods are mainly on the south end of the market.

HEC - Hotel & Restaurant SupplyEdit

345 Aomen Lu, Putuo District 酒总酒店设备大卖场 普陀区澳门路345号

Hotel and restaurant supplies. Popular and well known in the expat community for its selection and clean, professional shopping environment. Take note of the other wholesale shops off the street directly to the east of this place.

Caoyang Wholesale Fruit MarketEdit

1366 Caoyang Rd, Putuo District 上海山华果品市场北区 普陀区曹杨路1366

Huge wholesale fruit market in Puxi. Both Chinese and imported fruits

Tongchuan Marine MarketEdit

800 Tongchuan Rd, Putuo District 铜川水产市场北区 普陀区铜川路800号

Anything that lives in the water (watch out for the eel aisle). There is a small hotel supply and dry goods market on the west side and set back in on the north end.

Huanghai Frozen Foods MarketEdit

38 Beishi Rd, Putuo District 皇海冷冻食品商行 普陀区北石路38号

Imported and Chinese meats: beef, pork, poultry (turkeys), fish, etc.

Jiuxing Comprehensive MarketEdit

288 Jiuxing Rd, Minhang District 九星综合市场 闵行区九星路288号

Building materials, hardware, kitchen, bed & bath, furniture, hotel & restaurant supplies, fire & security, office supplies, signs, other. This place is huge and has its own internal road names with traffic lights and everything. You can find just about anything related to the above categories. Everything here is wholesale.

New Century Automobile Parts CityEdit

416 Changhe Rd (the block north west of Zhennan Rd and Changhe Rd) 普陀区常和路416号

Mainly has parts, supplies, and accessories for all types of bikes (bicycle, electric, motor). Go here to find neon lights to pimp out your electric bike, a soft seat, or that pink matte finish on your Vespa scooter. A couple shops still sell gas-powered scooters and a few shady shops sell "second hand" scooters.

Baoshan Audio & Video City (Electronics)Edit

111 Baoshan Rd 上海音像城 闸北区宝山路111号

Not a true wholesale market, but they specialize in second hand electronic goods and repairs mobile phones, computers, cameras, printers, stereo equipment, and KTV etc. You can even buy a tazer.