Can the public security bureau find the text messages five or six years ago?

Legal analysis: Under normal circumstances, the Public Security Bureau can't find it, but the Ministry of Industry and Information Technology can. If you send unhealthy information or sensitive words, you will be locked by regional mobile or Unicom. However, when detecting a case, the public security organ can check the mobile phone messages of the relevant personnel according to the needs of the case and in line with the regulations.

Legal basis: Article 148 of the Criminal Procedure Law of People's Republic of China (PRC). After filing a case, the public security organ can take technical investigation measures against crimes endangering national security, terrorist activities, organized crimes of underworld nature, major drug crimes or other crimes seriously endangering society after strict approval procedures according to the needs of investigating crimes.

After filing a case, the people's procuratorate may, according to the needs of investigating crimes and through strict approval procedures, take technical investigation measures for major cases of corruption and bribery and major cases of serious violations of citizens' personal rights committed by taking advantage of their powers, and hand them over to relevant organs for execution in accordance with regulations.

To hunt down a criminal suspect or defendant who is wanted at large or whose arrest has been approved, the necessary technical investigation measures may be taken upon approval.