Vision: In terms of the “wound effect” and “bleeding effect” on the skin, the “effect” of the spongilla spiculeis indeed far less “obvious” than that of the metal microneedle. Experience & safety: In terms of “experience effect” and “safety”, the “effect” of spongilla spicule is far better than that of metal microneedles. Efficacy: metal micro needle’s limit of 200,000 holes causes huge skin trauma, while spongilla spicules can easily create 3,000,000 uniform non-invasive channels, and can still continue to stimulate the self-repairing ability of the substrate for a period of time in the skin. which is better than metal microneedles