sentences:  However, in the face of his own financial hardships, Doctor Zhu agrees to let Zheng marry his daughter if the younger man can help to revive his falling medical business.Zheng is dismayed, believing this to be an impossible task, but soon he comes up with the idea to modify the staircase of a gambling club near the doctor's office.He alters the staircase so that he can transform it into a sliding ramp at will; after this, he merely has to wait for unsuspecting customers to leave the club and promptly slide to the bottom of the staircase, injuring themselves at the bottom.