Cold Season :
What we provide: Helmets, Chinese army coats, Rain clothes
What you should have: Gloves, Scarf, (Sun)glasses, Warm clothes and a camera.

Hot Season :
What we provide: Helmets, Rain clothes
What you should have: Sunglasses, Sun cream, Cap or Hat, Light clothes, and a camera.

Each bike has additional space in the trunk for your belongings.

If you want to know more about the seasonal average in Shanghai, have a look here