Upa - Meu Monstro Favorito (2015) was the highest grossing film of all time in China, as of September, 2015. It was surpassed by As Travessuras de Uma Sereia (2016) the following February.
Lead actor Kai Ko was arrested in Beijing for drug charges (marijuana) resulting in the recasting of his role by actor Boran Jing. This required re-shooting of 70% of the film and 25% of the computer animation. In total, the film took 7 years to complete.
The plot is very similar to the MIB: Homens de Preto (1997) series (i.e. aliens [now monsters] hide in human skin while being hunted).
As of September 11, 2015, the total box-office is 2,428,590,000 RMB.