Did the possession succeed?

Seeing Meng Chengcheng's calm expression and unchanged tone.

It was Chen Feng's first time witnessing a medium in action, and he was amazed. In his stereotypical impression, shouldn't mediums undergo dramatic personality changes, shake their heads, and speak in distorted voices during a séance?

Captain Wu whispered to Chen Feng, "Shh, don't disturb Chengcheng's séance."