In ancient China, the poor would eat rice with lots of water, its kinda like poridge except its rice.
This is not really true. Chinese civilization originated in Northern China which is too dry for rice growing. Only when Chinese settlers moved to Southern China did rice became important. Even as late as 1000CE the economic and cultural center of China is still base in Northern China. The diet in the North was mostly likely millet-based
For example, Northern Song ( 960–1127 CE) capital, Bianjing (modern day Kaifeng), is in modern day Henan province. Henan is in a region that was known as
Zhongyuan(Central Plain), which was the birth place of Chinese Civilization. Only after 12th century and later did the economics and political center shifted to Southern China. When I say Southern China it really just meant Jiangnan region (i.e. Modern day Shanghai and Nanjing area). Other region of modern day Southern China such as Guangdong, Guangxi, Fujian were considered to be too barbaric place to live.
Even in modern time if you go to Northern provinces such as Shanxi, and Shaanxi most of the diet there are noodle-base because the region is too dry for rice growing.
Back to the topic. I don't really know what ancient Chinese eat but from a historical novel I read about Northern Song period ( 960–1127 CE), Chinese like to eat mutton and venison. Notice, I didn't mention pork? Most Song era Chinese think pig is very dirty animal so they don't like to eat it. Only in later period did pork became more popular. Pork is such a integral part of modern Chinese cuisine that pork is synonymous with meat. So when a person went to a restaurant to order meat, they will be served pork.
[ame="http://www.amazon.com/Retreat-Elephants-Environmental-History-China/dp/0300101112"]Amazon.com: The Retreat of the Elephants: An Environmental History of China (9780300101119): Professor Mark Elvin: Books@@AMEPARAM@@http://ecx.images-amazon.com/images/I/416qyUxPc4L.@@AMEPARAM@@416qyUxPc4L[/ame]
I read that book about environmental history of China in it they mentioned a book published during Song era mentioning a receipt for cooking elephant trunk.
If you really want to learn more about Food of Ancient China. You can try this book. I haven't read it yet...it's on my wish list though
[ame="http://www.amazon.com/Food-China-N-Anderson/dp/0300047398/ref=wl_it_dp_o?ie=UTF8&coliid=I2O41B838KP6IR&colid=29DWURL9IU4NX"]Amazon.com: The Food of China (9780300047394): E. N. Anderson: Books@@AMEPARAM@@http://ecx.images-amazon.com/images/I/51AJYQQCWVL.@@AMEPARAM@@51AJYQQCWVL[/ame]