The literal translation of the title of this movie is: Daughter of China.
Like most Chinese war movies, this one is based on the true story that really happened in real life, but also like most movie, it is also incomplete due to governmental censorship and thus is not as accurate as it should have been.
The movie gave a realistic depiction of what really happened, and is honest about both the victory and setback. However, what was willfully ignored in the movie was the cause of the setback: Soviet dictator Joseph Stalin was afraid that Japan would attack former-USSR and order the Chinese guerrilla to launch massive attacks against the Japanese which were superior both in equipment and numbers, and resulting in the heavy loss of guerrilla. When this movie was made, China and the former-USSR were still close and the governmental censorship prevented the movie from honestly telling this cause of the defeat.