Rice was the first grain that was farmed in China. Cultivation began around 5,000 b.c. The rice that wasn't used was made into rice wine.
Wheat wasn't native to China so it took longer to reach China. Tea was native to China,and it grew wild so they made it into a drink that everyone enjoys to this day.
The meat that they used and ate was pork and chicken because that is what they raised and fed.