Shock

Long Fangyu stood before the giant gate of the secret realm, staring at the iridescent colors of the barrier that kept the secret realm out of the regular world.

He stared at it, but his eyes did not see anything. His mind was lost in his thoughts, and the only thing he could think at the moment was that he hated himself. 

He was a coward, a hypocrite. After gaining his brother's trust that he would not do anything to hurt him, he told his father exactly where he had to go to find him.

He hadn't told the Emperor about his brother. The Emperor had only come there to meet with Alex. But by telling him where Alex had gone to, he had pretty much told his father where his brother was too.

The moment his father said that the king of the Southern Continent might be plotting something, he had lost all sense in him to hold back his information and told his father exactly what he needed to hear.

He had put the empire's priority before his brother.