Niu Skin Bright & Clear Face Cream is described as a “potent formula designed to combat acne and all forms of discoloration” — this includes age spots, sun spots, and post-inflammatory hyperpigmentation.

Ingredients listed on some vendor sites include Azelaic Acid, Kojic Acid, and Tranexamic Acid — which are popularly used for brightening, evening out skin tone, reducing dark spots and hyperpigmentation, and for acne-fighting/clarifying benefits.
Besides brightening and spot-fading, the cream is marketed as hydrating, leaving skin “radiant, smooth, and refreshed” without heavy greasiness — often pitched as a daily moisturiser suitable for people dealing with acne, uneven tone or dark spots.

It is reportedly suitable for daily use — though as with many actives, consistent use and correct skincare routine likely matter.

What many people use it for — Potential benefits
Brightening and evening skin tone.
Fading dark spots, sun spots, or marks from prior acne (hyperpigmentation).
Helping manage acne and blemishes (due to presence of azelaic acid and other actives).
Moisturizing and improving skin smoothness/texture.
Offering a “lighter” cream option (non-greasy feel), which can be more comfortable for oily or combination skin.