Yes, I think the Egyptian, Mesopotamian and Indian civlizations are older than Chinese. But they are not as persistent Chinese. In the history, the people and culture of these civilizations were destroyed and replaced by other nations. Indeed, the China also was invaded in many times by other nations, but finnaly, these foreign nationalities were assimilated by the chinese culture. And I thinks this is the real strongest trait of the China civlization, not its science, enconomy or military in the ancient years or in the modern years.