Two Chinese diplomats engaged in a fight with Samurai swords Thursday night in the embassy's residence in Sofia, local Trud daily reported.
It is suspected the fight started because of a woman.
The younger man is the 28-year-old secretary of the military attache; who suffered eight wounds in the back. He has been transported to the Military Medical Academy; his life is in danger.
The other is the 32-year-old third secretary in the diplomatic mission.
Immunity prevents the two diplomats from prosecution and forestalls an investigation into the case.
The incident coincides with the official visit of the Chinese Defense Minister.