Weeping Blood Cloud

After two years of ground theoretical study, Xiang Yunfei came to the aviation school in Phoenix. When he participated in flight training for the first time, Xiang Yunfei was assigned to a plane that no one wanted to touch. He didn't know at the time that someone had died on it. After the plane took off, he fell asleep without knowing it. On the unmanned plane, he heard a voice saying: Turn off the air conditioning... Purpose: Being honest about mistakes is not the beginning of tragedy, it is to prevent future generations from making the same mistakes again.