Police have detained 90 computer hackers and arrested 3,300 suspects they say were involved in the trading of personal information since April, the Ministry of Public Security said on Monday.
A Shanghai court sentenced four people to 10 to 14 years in prison on Monday for their involvement in a telecom fraud case.
China's top court has called on judges to severely punish fraudsters using telecom or network technology, after the deaths of two students who were swindled in August.