* They are skilled in technology and innovation. District 3 is known for its "technology and craftsmanship," specifically mentioned in the book as being responsible for the Peacekeeper's weaponry. This aligns with the fact that they are described as a wealthy district and known for their skilled workers.
* They are likely under the control of the Capitol. This is implied through the statement that they are "renowned for their technology and craftsmanship," which suggests that they are being used by the Capitol to maintain its power and control. It is unlikely that they are allowed to use their technological skills for their own benefit.
* The Capitol is aware of their dissatisfaction. The fact that the Capitol assigns their "most handsome and charming" peacekeeper to District 3 suggests that they are aware of the district's dissatisfaction and are trying to appease them. This is possibly due to the possibility of an uprising in the district given their technological prowess.
While Chapter 11 doesn't delve deep into the inner workings of District 3, it provides a glimpse into their potential power and the Capitol's strategies to keep them in line.