GSK is a kind of pure gold, which is very interesting, just like many workers in ancient times skillfully marked their names when making things for the emperor in order to survive!

Gsk Shenzhen Baitai is a very famous gold production and processing factory ~ So GSK Quanjin is the Quanjin processed by Shenzhen Baitai!

C is the year number of their family.

And a and b!