Watched this movie in China. The cast for American soldiers didn't look like soldiers at all, neither were they professional actors. More like random English teachers with a white face selected from the streets of China. The conversations were unconnected and why on earth did an American soldier salute a Chinese soldier who froze to death? That is a very weird character plot.
All in all, this movie is just designed to make the Chinese citizens believe that because they won an ancient battle, they can will a war in 2022, should the need arise.