A man suspected his wife was cheating on him, so when he left town, he hired a famous Chinese private investigator. 

A few days later he received this letter.

Most Honorable Sir,
You leave house,
he come to house.
He and she leave house, I follow.
He and she go to hotel,
I climb tree to see.
He kiss she,
she kiss he.
He strip she,
she strip he.
I play with me,
I fall out of tree,
I not see.
No fee, Chen Lee