The big stone building at the top is the main workshop, that's where the furnace is and where all the metal was smelted and the tools were cast as you'll be able to see.

顶部的大石头建筑是主车间，那里有熔炉，所有的金属都是在这里熔炼的，工具也是在这里铸造的，你们可以看到。