The names of those who pleaded guilty were not released because four of the defendants are juveniles, the state-run Xinhua news service reported Friday.
The son of Li Shuangjiang, dean of the music department of the People's Liberation Army Academy of Arts, was said to be one of the five defendants.
The suspects were arrested Feb. 20 after a woman told police she had been taken to a hotel and sexually assaulted after drinking with the men.
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