Yan Yanyi, brother.
Yan Yaner, younger brother.
Before they were born, they were the tools of their father's revenge, so there were two twin brothers, one was twenty years old and the other was fifteen years old.
In order to survive, he had to "inherit" his father's will and kill people.
The innocent younger brother, who yearned for a happy life, was coaxed into dying on the operating table in the laboratory. He didn't even know that he would die, and he was full of expectations for a happy life with his brother in the future.
...
Country A's military:
In the name of saving the country, we arbitrarily deprive others of their right to live.
Use the hatred of others as a sharp sword.
The consequence is self-destruction.