How Wu Jingguo managed to find out the truth about his half-brother was simply an accident. He did not mean to find out what was hidden behind his brother's mask, but one day, he accidentally saw golden fish scales on his brother's forehead.
That was the day he finally found out that his brother was a half-fish demon, but instead of telling his mother and their faction about it, he chose to keep it all to himself. Even when his father and brother found out that he had known everything, he still didn't tell anyone else.
That was why his faction had remained in the dark about Wu Jinhai's secrets for so many years. That was also the reason why Song Tingfeng looked so angry with him at the moment. Song Tingfeng even tightly clenched his hands in his lap as if he was clenching Wu Jingguo in his grasp.