- The role of Helen Mirren claimed to be the "Queen of England" in the film. In reality, she was crowned an Oscar with "The Queen" and played the role of the British royal family many times.
- Ernest Bogning, who played Henry in the 2010 first song, unfortunately passed away in July 2012. He had already taken over the sequel and asked the producer to equip his character with a machine gun.
- Director Robert Swink retired after directing the first part of "Red Flame Battlefield", and then directed the action film "Underworld Police" also starring Mary Louise Parker, and the sequel director was replaced by Di En Perissat. It is worth mentioning that "Red Flame Battlefield 2" and "Underworld Police" are not only similar in action comedies, but also on the same day in North America.
- The film has its world premiere in Los Angeles, USA, and Psy also came to the scene to help Li Bingxian.
- During the promotion of the film, Mary Louise Parker stated that she intends to withdraw from the film world because she is troubled by negative comments on the Internet. She hopes to be able to write for magazines, or take care of children, raise goats, and toast at home. The internet".
- In order to create a super muscular man with agility in the play, Li Bingxian insisted on eating only chicken breasts and fish and exercising for two hours a day.
RED 2 behind the scenes gags
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Frank: Eleven million people are gonna lose their lives if you don't help me.
[tosses him the gun]
Han Cho Bai: [reluctantly tosses it back] All right. Let's go.
[pause]
Han Cho Bai: This doesn't mean I'm not going to kill you later.
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Marvin: She has talents you and I will never have.
Frank: What talents?
Marvin: People like her.
Han Cho Bai: If she lives, this'll be good for your relationship. You're right.
Marvin: And if there's one thing I know, it's women and covert ops.
Frank: That's two things.
Han Cho Bai: No, grasshopper. It is not.