(0,-10) is the y-intercept
Chinese may take it particularly offensive Greco Roman Empire is table etiquette and behavior towards food. There are customs in Greco Roman empire that is taboo to Chinese. One particular example is that extravagant Roman feast would last up to 10 hours, they would eat until they vomit and then eat again until the feast is over. They also eat mammary gland of cows, flamigoe tongue and elephants that are unusual to Chinese. One similarity of these empires would be the use of minted coins in trades.
Society of the America and North Africa are closely parallel but their biggest difference is that Americans don't claim to be native and original people, thus one of the oddities of modern time is found in North Africa. American today classified themselves as a middle class.
Jin Dynasty which was in China and for east africa I cant find or remember anything from their the closest is the Islamic empire.