While Feng Xiaosong, a government clerk, was sentenced to 11 years and a half in jail for the same crime, state media reported.
The trials were held behind closed doors.
The No 1 Intermediate People's Court of Hainan Province said it heard the cases of Chen, the former principal of Wanning No 2 Primary School, and Feng, a former clerk at the city's property administration bureau.
Both men have been charged with rape, and the cases were accepted by the court on June 9, state-run Xinhua news agency reported.
Also Read
Chen stood accused of taking four girls to a hotel, while Feng allegedly took two girls to another hotel on the evening of May 8, according to local police.
The girls were all in the sixth grade and aged between 11 and 14.
Feng said he would appeal, while Chen said he needed time to consider whether to appeal or not.