What might an observant Chinese traveler from the Han dynasty era find surprising of offensive in India of the greco-roman world? what similarities might he or she notice?

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.