This wa all thanks to Custodian Huo.

The Emperor asked emotionlessly, "Custodian Huo, anything else you want to say?"

Custodian Huo was nervous, "Your Majesty, I got poisoned! I feel very itchy at my chest, and I accidentally dropped the pillar. It's cracked now!" He then went straight to the point, "Your Majesty, Miss Gu accidentally toppled the jade pillar, and I rushed to support it. She then fell into my arms, and her hairpin poked my chest. Her hairpin must be poisonous! Your Majesty, please check her hairpin!"