The loose bricks laid on the road surface in the community caused the child to fall and fracture. Does the property bear the responsibility? How much responsibility?

This can only be negotiated with the property and let them pay part of it. If negotiation fails, they can only go through legal procedures. It's hard to say exactly how much here, because there are problems of poor property management and poor parental care, and the responsibility can only be judged by the court. Of course, dual-energy negotiation is the best and most direct. You can put forward your own reasonable conditions to negotiate, and then the two sides can find a balance point.