My suggestions:
Build a couple of warriors to explore, then start a granary.
Mine the two bonus grass squares, and try to irrigate the cow, Chop the wood with the game (this will help with the granary) and irrigate tbe cleared square. Start pumping out settlers from Beijing and don't stop until you run out of places to settle. Military units can be built in other cities.
Read the articles on settler factories, to see the best way to manage Beijing with maximum effieciency.