Think of a plausible way that the inventions of Song Dynasty China spread to other parts of the world outside of it's native region. You get 10 points if these inventions spread to other culturally Chinese-influenced nations such as Japan or Korea, 20 points if they spread to the rest of East Asia (i.e. India, Malaysia, Siam, etc.), 30 if these inventions spread to the Middle East, 50 if they reach Eastern Europe and North Africa, and you win everything if you manage to find a plausible way to make them reach Western Europe and Sub-Saharan Africa.