Soundproof / Acoustic Curtains or other soundproofing materials?

After me and my family moved to my new place in Sanxia we realised (even after checking that place 4 times before we rented in different times of a day) that it is way to loud. We live on 14th floor and didn’t expect that much noise from the street plus rubbish trucks making rounds around neighbourhood at 7am almost every day. Our windows are 4-5mm thick and give us 0 noise protection. Changing windows is not an option so we are looking for some other options. Acoustic curtains would be one I guess. Any idea where I can find them? Or any other ideas for soundproofing?

Not sure if this OP succeeded, but you could look into what he posted…

For immediate solution, ear plugs.