What is the name of the mask made of pigskin in the copper coin niche?

The mask made of pigskin in the world of copper coin niche is called copper coin mask. Chapter 51 of the novel is about the niche of copper coins, which is about Xue Xian's face and wall. He found a mask made of pigskin and inlaid with copper coins. I've never seen the second one in my life, named copper mask. The Shrine of Copper Coin is an aesthetic fantasy novel written by Mu Suli, the author of Jinjiang Literature City. The full text is divided into six volumes: seeking, nameless, boundless, unchanged, regretless and returning to the shore. It tells the story of semi-paralyzed Pipilong Xuexian, Gao Leng and Shang Minxuan looking for keels and memories together.