So what if their civilization is ancient? Chinese leaders are born and die just like Western leaders who, by contrast, supposedly are short-term thinkers hamstrung in dealing with the cunning Chinese. Unless you want to argue that somehow Chinese leaders pass along the wisdom of centuries of rulers, why their civilization's age should give them unique planning abilities is beyond me. Are Egyptians also noted as deep, long-term planners who have great patience, hmm?
I maintain that some Westerners see a veil of secrecy and caution in foreign policy, and interpret that as signs of long-range, deep planning.
If the Chinese leaders are patient, long-term planners, it sure isn't from the Han gene pool:
The government has, for decades, used nationalism (appealing to popular sentiment about China being strong and powerful) to keep people from dwelling on government corruption and incompetence. That has worked a bit too well, with opinion polls showing the majority of the population wants China to be more forceful with other countries that refuse to do what China tells them to do. There is also public support for doing the opposite of whatever the West demands.
One, the Chinese leaders didn't see that coming?
And two, the Chinese people sure are failing the deep and long-term thinking test if they simply want to do things that the West says they shouldn't.