As for trying to get any useful artifacts or Heavenly Materials and Earthly Treasures from Zhao Yalan? Nonexistent. What good things could a person who has just been promoted to a Second Tier Awakened possibly have on them?
Zhang Yanhang didn't particularly care about the suddenly silent and odd atmosphere; he just quietly began to concentrate on fusing Thermo-baric Bombs, after all, this was his main goal at the moment.
Of course, the strange atmosphere didn't last too long because after being silent for a while, Zhao Yalan actively added Zhang Yanhang as a friend and then slipped out of the public class quietly once again.
After all, there was no need for her to stay here. If she wanted to join the departmental authorities, she could certainly ask Zhang Yanhang for help, and it seemed like she had other matters to attend to.