In the past, he had read a novel and had no time to read it after reading half of it. Now that he thought about it, he could not remember the name. I think it's the underworld or something

I remember that the main character was the only one who could smile in the training camp. Also, his ultimate skill was five spinning throwing knives. Later on, he learned how to use toothpicks and poker cards. [Description: In the beginning, the male lead and his brother escaped from a foreign assassin training camp and were hunted down by an instructor. Later, the male lead ran away and the instructor was killed by the male lead. The person who ran with him died while saving the male lead. Before he died, he asked him to take care of his sister. Later, he found out that he was not dead and had been secretly helping him.] <Key> After the male protagonist returned to China, he got a martial arts secret manual from an old man for some reason. It seems to be the Xiaoyao Kung Fu. However, the appearance of this martial arts secret manual is the Dream of the Red Chamber (The male protagonist and his brother's names are from the killer training camp, so I only remember that they are codenamed Thirteen and Twelve). That's all because the beginning is easier to remember.