The group is trying to turn the area at the foot of Long Biên Bridge, which is mostly frequented by homeless people and scrap-iron dealers, into an attractive spot for local youths and tourists.
Trần Văn Cường has been nicknamed "rubbish Cường" or "crazy guy" thanks to his efforts.
Lưu Chung Nghĩa is worried about the amount of plastic that is being thrown away. So, he is making toys from plastic goods to give the plastic a new use.
The HCM City Department of Natural Resources and Environment plans to change the way solid waste is classified at source to suit treatment technologies, its chief has said.
It's hard to believe that the special sightseeing area was fashioned out of an old rubbish dump.