Is Zhang Zhengyi dead in Detective B?

Story logic: First, Zhang Zhengyi was diagnosed (probably misdiagnosed) with terminal cancer; then, Zhang Zhengyi hoped to die in the line of duty out of concern and love for his aunt, so that he could leave a legacy to his aunt. The idea of ??an honor and a pension that will allow him to enjoy his old age is highlighted in the knife fight in the hotel where he hunts down the funny and unlucky guy of the century "Oguchi Ying"; after that, Zhang Zhengyi will be unable to die N times, The pain of having no one to talk to, and the funny scene of imagining that he was shot to death for no reason by a group of martial arts brothers; of course, the final story should explain the cause of the misdiagnosis and give Brother Zhengyi an ideal of survival, and then "the prince and princess live a happy life" Together."