Help me to know the name of this movie, please :(?

The only thing that I remember is that:

It was a chinese movie

It was about a superhero but not a real superhero he just act it like one but he didn't have superpowers or anything like that

In the movie there was I think an american actor (he was definitely a foreigner actor)

The superhero was the only one that could see that foreign character

The superhero had a girlfriend and they used to live together but for some reason they broke up

And that's all I can remember, I tried to look it up on google but there was all marvel for some reason :(

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