The defendants and victims were "parachute kids" who studied in Southern California while their parents remained back home.
Yunyao "Helen" Zhai was sentenced to 13 years behind bars yesterday; Yuhan "Coco" Yang got 10 years; and Xinlei "John" Zhang received a six-year term. All three apologised in court for their actions.
"I hope they do not carry the wounds from what I did for the rest of their lives," Zhai wrote of the victims in a statement read by her attorney.
Two days later, prosecutors say, they kidnapped an 18-year-old classmate and took her to a park where she was stripped, beaten, punched, kicked, spat on, burned with cigarettes and forced to eat her own hair during a five-hour assault.
The 16-year-old was attacked because Zhai felt she had disrespected her, and the other woman was attacked because of disputes over a boy and an unpaid restaurant bill, investigators said.
The defendants pleaded no contest last month to kidnapping and assault. A charge of torture, which carries a potential life sentence, was dropped.
In her statement, Zhai said living so far from her parents played a role in her actions.
"They sent me to the US for a better life and a fuller education," she said. "Along with that came a lot of freedom, in fact too much freedom."
"Here, I became lonely and lost," she wrote. "I didn't tell my parents because I didn't want them to worry about me."
"Parents in China are well-meaning and send their kids thousands of miles away with no supervision and too much freedom," Yang said in a letter read by her attorney. "That is a formula for disaster."
The victims weren't in court yesterday but prosecutor Casey Jarvis said the woman who was stripped and burned has forgiven her attackers.
"She's a happy person, and that was taken from her repeatedly. But somehow she was able to find forgiveness," he told the judge.
A 16-year-old girl and a 17-year-old boy were previously sentenced to juvenile camp for their roles in attacks. Another man, Zheng Lu, 20, is facing trial on charges of kidnapping, torture and assault.
