However, the specific string does not appear as a standard official term in the game’s primary documentation. It likely represents a specific technical version or a niche enthusiast modification (often related to "Little Butter" community refinements or regional "Xian" [Xi'an] top-tier rankings).
Here is where the V107 shines defensively (for a fast blade). The "Xian" top absorbs heavy spin. When blocking a loop, you don't need to close the racket angle as much; the tension in the top ply naturally counters the incoming topspin. Expert players describe it as "blocking with a closed fist." liu shan maker v107 xian top