Introduction to the prologue hall: In the center of the prologue hall, there is an image of a salt worker digging a well, showing the scene of the well-sinking worker lifting the iron file out of the wellhead.
Introduction to the prologue hall: In the center of the prologue hall, there is an image of a salt worker digging a well, showing the scene of the well-sinking worker lifting the iron file out of the wellhead.