Q: What is "Tian Ji Dong"? A: The word "Dong" in the phrase "Tian Ji Dong" refers to the word "Zuodong", which means "to be the host of a dinner party". This is an epigram, the whole sentence is "Tian Ji Zu Dong - each one pays for each one", which means that after a group of people have tea and food, in the end, everyone will be the host and pay for their own share of the money, which is also known as the so-called AA system (Going Dutch) in daily life. Q: Where does the phrase "Tian Ji Dong" come from? A: As for the phrase "Tian Ji Dong", the meaning of "each one cares for each one" should come from another hiatus - "Tian Ji crosses the river ---- each one holds up his own". The word "support" here originally refers to the swimming action of the frogs, and by extension, it refers to the way people seek to survive in the society and "support themselves". The meaning of the whole sentence is to borrow the chicken crossing the river, each with its own stomping posture, thus comparing the different classes of society with their own work, each relying on their own skills to make a living and start a business.

Reference: (1)cantonese.sheik.co.uk/dictionary/words/23322/(2)big5.ct/food/meishixhy/a10