With a revenue of 132 billion, "Tunnels: The sun in the dark" has begun to be profitable. Film production investment 55 billion. With a division of revenue ratio of 50-50 (or 40-60) for the publisher, the film needs to reach about VND 120 billion to break even.
However, besides compliments from experts, criticism, "Tunnels: The sun in the dark" is also controversial when some viewers think that they do not have a tragic emotion, majestic atmosphere, strong emotion when watching movies.
On film forums, there are also opinions expressing about the film that cut too fast, the hard -to -hear voice makes the audience dominated when watching the movie. They did not grasp the character line, and it was difficult to track the film circuit.
In a conversation with the Labor correspondent, director Bui Thac Chuyen measured the controversies that could happen, he said: "There will be many people when going to a war movie, they bring psychology to wait for the tragic, heroic, strong emotions ... but that will not be the emotion that the war in Cu Chi tunnel can bring. The battle in the tunnel is a different color."
According to director Bui Thac specializes in analyzing, most of the war films will choose the corner to exploit the context of battles played by the two sides of the army.
“When the army plays with the army, there will be a array, tactical, the use of balanced weapons on both sides, matching forces ... If exploiting this corner, the cinema will have monumental scenes and viciousness to bring heroic feelings. The battle in the tunnel is the war between the people (guerrillas) and the army. Used by the US to recycle. The comparison of the force correlation will be a great difference between the "ground guerrilla" Cu Chi and the most elite army in the world of the United States.
The film was criticized for the cutting section too fast, the director revealed, the original edition was longer than 3 hours and then had to be cut short to 2 hours 8 minutes.

Regarding the controversy surrounding the film, director Bui Thac Chuyen affirmed that, he always made a film in a humble, unobtrusive, unwavering storytelling style. Therefore, he will receive all compliments from the audience. Bui Thac Chuyen said that a film that can create different dimensions is a good thing.