Why are photos of military training instructors not allowed to be uploaded online?

Photos of military training instructors are not allowed to be uploaded to the Internet because military personnel are a profession involving national security and have certain confidentiality.

Soldiers do not have household registration, only collective household registration. Their operations are confidential. In various media reports, there are often references to "a certain group army" and "a certain artillery brigade" because the specific number of the army is a state secret. Similarly, the identity of instructors cannot be disclosed in detail regarding their actions during teaching, otherwise it may cause serious leaks and endanger national defense security.

It may also be the habit formed by the instructors in the army. They don’t want to show off or be pretentious. It turns out that the duty of a soldier is to protect the people, not to enjoy themselves. Being a soldier is a noble profession. After his identity as a soldier is exposed, his unit will punish him accordingly.