C502 The refinement of poison gu

"Weng weng weng ?"

The sound of wings flapping rapidly in the air was the sound of countless wings.

"It just flew over, it's too unscientific."

Yun Zihuang raised her head and looked into the sky. Just now, when many bugs were crawling towards the caldron from the grass, she was still wondering why none of those insects with wings appeared