Well, the chinese big secret was silk. So that would be my best guess.
<span>Creo que este sitio web está basado en inglés
</span>
English: I believe that this website is English based
The Song Dynasty was so large and that was a factor in the empire's decline. They created so many positions within the bureaucracy and the men in those positions received a generous amount of money.
The answer is : Communist insurgent
