Qian had already figured that Dalong wouldn't accept the special recruitment offer from above; even if he did, his comrades from the same intake wouldn't accept it. They had all gotten in through assessments, and if Dalong were specially recruited just because he saved someone, it would inevitably make people resent him.
On top of that, Yu Minglang was Dalong's brother‑in‑law. If someone brought this up in the future, they might even spin it into "Yu Minglang deliberately staged a heroic rescue just to get his little brother‑in‑law released."
Dalong helped Qian collect evidence, then got hurt doing a good deed. Yu Minglang specially recruiting him wouldn't be excessive at all, but for her brother's future, Qian still chose to extend the assessment period. Dalong went back to sit the assessment right after helping her collect evidence; whether he stayed or not would depend on himself. And sure enough, Dalong lived up to expectations and got a good ranking.
