"Chinese detective's report" joke

A wealthy chinaman suspected his wife of being unfaithful to him and hired a prominent chinese detective to watch his wife; the following is his report:
DETECTIVE'S REPORT
You leave house
I watch house
Man come to house
Man ring door bell
Wife open door
Man go in house
Man and your wife leave house
They go railroad station
I go railroad station
They go on train
I go on train
They get off train
I get off train
They go to hotel
I go to hotel
They go inside
I no go inside
I climb tree outside window
He undress she
She undress he
He play with she
She play with he
I play with me
I fall out of tree
I no see