Yes I agree what Leo said about China, pre-placed independent or maybe barbarian cities in South China is a better choice than a new Baiyue Civilization. Either Wu or Yue State is a part of Zhou Dynasty and nominally they obey the domination of the King of Zhou. So they are not able to be an independent civ. Also maybe out of topic. I find that only 2 independent leaders is to few for DoC. Independent cities in Africa and East Asia have a same leader and same techs, it's absurd. But I don't know how to find a better way to solve it.