Blue Bird's cautious action was certainly within Zheng Qing's expectations.
However, Lin Guo's actions greatly exceeded the young scholar's expectations, causing him much frustration. He had thought that his previous guess would scare the young wizard and lead him to retreat, but it only served to pique the young lad's interest in the ruins that seemed like a graveyard.
But on second thought, Lin Guo's reaction wasn't too strange.
The reason the young wizard felt fear earlier was because he was facing the 'unknown', which naturally instilled fear. But now that he knew the area might be the 'graveyard' rumored in the school, possibly with a few stiff corpses, there didn't seem to be anything to be afraid of. For wizards, especially the young ones studying at the top academy, as long as it's not a sentient living corpse, other slow and instinct-driven dead aren't anything to fear—they're perfect for research and experimentation.