The Vidhu Vinod Chopra-directed film was released in Chinese theatres two weeks ago with 900 prints.
Sameer Rao, CEO of Vinod Chopra Films, said: "Mainland China is the second biggest film market after the US but it is very difficult to enter because only 20 foreign films can be screened in China in a year.
"After its success in just two weeks, the VCF camp has built high hopes that the movie will have a very long run in the Chinese market."
Anil Arjun, the CEO of Reliance Media Works, added: "The message in the film has been the pull factor in the film. Such a great response from a non-traditional territory like China is a welcome phenomenon for the Hindi film market."
The film also starred Tamil star Madhavan and Sharman Joshi.
3 Idiots was nominated for 14 International Indian Film Academy awards.
Joshi will be seen next in upcoming release Ferrari Ki Sawari, his first role as a lead actor.