It seemed like he had swallowed something hard to digest. When the Second Prince realized the Emperor indeed favored others, there was a ball of rage stuck in his stomach.
When Cen Lizhui and the others arrived at the Cold Palace, the Second Prince wasn't present, so he hadn't heard that woman's story nor did he know the Crown Prince might not be the Empress's biological child.
Therefore, when the Second Prince noticed the Emperor not only harming the Crown Prince but showing some favoritism towards the Fifth Prince, also under the Empress's care, he felt it was unfair to the Crown Prince.
He had seen the Crown Prince as a child striving hard for a few words of praise from their father. The Crown Prince used to enjoy playing, but later he forcefully made learning his sole hobby.
