Also explains that the social housing residents were offered to purchase their units at below-market rates and 80% of them took the offer, and that social housing was built as part of the project despite some buildings having been taken down. This is not your average "gentrification," which is when poor people are pushed out of a place either through literal eviction so that their homes can be redeveloped into luxury units, or via price increases they can't bear due to property value increases.
Making a place nicer for people to live can be gentrifying, and often is, but in this case it looks like measures were taken to ensure that it didn't happen.