The focus and stress of Chinese sentences is a subject receiving constant attention from the fields of linguistics, phonetics and linguistic engineering. Since 1980s, the idea that a sudden drop in tone occurs after an accent has become a mainstream point of view in the studies of intonation and stress. Dealing with this subject, Cao Wen has designed three experiments to investigate and verify the prosodic features of the focus and stress in short Chinese sentences. The experiments include not only analyses of pronunciation, but also synthetic discrimination and the sentences are taken from both laboratory and corpus. Based on a large number of experimental data and statistical analyses, the author comes to an innovative and universally significant conclusion.