What is the evaluation standard of social documentary photography?

Documentary photography must first be true, without which there is no documentary. Authenticity is the life of documentary photography and the professional ethics of documentary photographers. Therefore, insisting on snapping has become a professional ethics and photography pursuit. "Grasping" is only a means, and the picture is the result. Is the information given to readers by pictures and words true, or is it true in essence in line with objective reality? Of course. Truth is relative. Photography can only be a representation, not the thing itself, and the picture will be different with different observation angles. Therefore, the truth of photography is the "truth" of the photographer's understanding of the subject. Make-up, screen manipulation, post-processing and screen modification are all documentary, especially news photography.