400
State 4 facts each of the Tang, Song, and Yuan dyansties.
Tang- Empress Wu, Buddhism, tributary states, champa rice, equal field system, flying credit, paper money
Song- weak military, paid tribute to Korea and northern nomads, footbinding, many advanced weapons- grenades, rockets, cannons, etc.
Yuan- Kublai Khan, Mongol rule in China, Persian bureaucrats in the government, toleration of Buddhism, merchant status up, Silk Road trade- Pax Mongolia, passports, stations