CJ7 actually stands for Changjiang Number 7 长江7号

It's not your usual Stephen Chow comedy. It's about a poor father & son living in a dilapidated house living with little income. Father works as construction worker who earns very little and saves a lot and all he ever wanted was for his son to be happy and would always teach his son the righteous way.

But the little boy was always being bullied & look down upon at school and at times he'd be angry at his dad for the plight they were in. He envied the toys which his classmates play and yearns for a toy himself too but his dad refuse to buy for him even though his dad told him they don't need such stuffs.

One night, the father went to the dump to find stuffs which might be useful for them and discovered a little toy and decided to bring home to surprise his son. But the son was still angry with the dad and refuse to accept the toy which, of course, turns out to be his alien friend.
Wearing CJ on his neck.

Throughout the 'befriending' part was rather boring, and the kids at school were also being very ridiculous which I didn't quite due to the existence of bullies in the kid's school.

The touching part came when Stephen Chow met up with an accident at the construction site and was sent to the hospital and the boy rushed to the hospital with his teacher to find out that his father couldn't make it and passed away.

Then miracle happened! CJ7 pop out of the boy's bag and used his energy to save his father and that was how the father came back to life and the boy was grateful and happy to have his father by his side again! He knew CJ7 saved his father but was also sad that CJ7 wouldn't come back to them again....

The ending was quite... abrupt, funny, lame all at the same time. Stephen Chow was seeing his son's teacher and there were crushes happening amongst the boy's classmates and the show ended with MANY MANY CJ7s coming back to visit the boy...

And I later knew that the boy in the movie is actually... A GIRL!!!
This child actress cut her hair for this role! Impressive!