Gold, silver, copper—at the end of the day, they are all metals.
In this world, everything has its natural enemy. Metals are no exception. The most common and top-grade poison in the Tang Sect, [Cartilage Water], is the bane of metals.
As a sect skilled in everything from picking locks to decapitating generals amidst a thousand troops, Tang Sect's research on metals was no less intense than their study of poisons.
And as a premier beneficiary of Tang Sect's technology, Tang Wan had naturally learned how to use Cartilage Water, capable of softening both metal and human bones. She was the first to creatively employ Cartilage Water during her escape, molding the city gate like clay and giving it the finger.