C1425 We Are Professional

Enjoying the flattery beside him, Prof. Du's face was filled with pride: "Director Guo, you heard it too, right? These students of mine can help you check the geology."

"Prof. Du, we suddenly collapsed here just now. We don't know the reason."

Frowning, Guo Yuyan explained, "This has seriously affected our construction progress and …"

Before he could finish his sentence, Prof