Domestic suspense film "Door Lock" grabbed the top spot on the Chinese mainland box office chart on its first day of screening Friday, data from the China Movie Data Information Network showed Saturday.

The film, which narrates the horrible experience of a single woman living alone in the big city, raked in nearly 39.93 million yuan (6.26 million U.S. dollars) on Friday.

It was followed by "Be Somebody," a domestic comedy-suspense film that follows a group of frustrated filmmakers who gather to plan on a new film about a notorious criminal case. The film netted over 28.85 million yuan on its ninth day of screening.

War film "Railway Heroes" ranked third with a daily revenue of 17.33 million yuan on its debut.(China news)