Finally, in 1380, Hongwu had Hu and his entire family arrested and executed on charges of treason. Using this as an opportunity to purge his government, the emperor also ordered the execution of countless other officials, as well as their families, for associating with Hu.
As I recall it was rolled-steel girders riveted together, probably from shipbuilding, together with steam-powered winches and an abundance of cheap steel. As opposed to European cathedrals erected with animal-powered winches and with more expensive forged iron bracing (one of the big cathedrals has a kind or iron corset to keep the walls from bursting outwards).
I believe it is true, I think what your asking is related to the United Nations
B- United Nations was formed in 1945 to promote international order
