There is an overpass on your way to Huaxin Development Zone, and there is a big place under the overpass that specializes in buying and selling used bicycles.

Many students from South China University bought them there.

You can go and have a look.

It seems quite a lot.

In addition, you can go to places where bicycles are repaired, and they will also be sold there.

Give me extra points if you feel good, hehe ~ ~