When to go
Best time
Night, Midnight+
Since there aren't any seasonal elements in view, you'll be able to photograph this perspective of Nan Pu Da Qiao (Nan Pu Bridge) and Huangpu River during any month of the year.
I think it's best to visit this location at night so you can feature the lights from the bridge.
Field tips
Before flying a drone, check and follow all drone regulations and rules.
Please be mindful of the drone signal since you're takeoff point is a decent distance from the bridge. If you're too far away, you'll lose your signal and not be able to communicate with your drone.
Try setting your drone on Auto Exposure Bracketing (AEB) mode before you start taking photos. This mode will automatically take more shots, and then later in post processing, you can make an HDR (high-dynamic-range) image with what you captured.
The bridge is the focal point here — make sure to keep that in mind once your drone takes flight! I also think it's best to include both sides of the bridge so you can feature the large pillars on either side.
Current weather
Do nearby
I recommend bringing along some food to have a picnic while enjoying the incredible view before the sun sets. Then, once it's dark, you can go get your shots of the illuminated bridge.
The nearby South Bund Fabric Market is a great place to get quality, custom-made clothes.