GOIGN AWAY FOR THE SUMMER
the correct answer is containment
Its fair to say that "it is designed to bend like a willow" because the constitution was made fairly flexible, and this gave the government bandwidth to extend its power to meet new situations.
The Zhou created the Mandate of Heaven: the idea that there could be only one legitimate ruler of China at a time, and that this ruler had the blessing of the gods. They used this Mandate to justify their overthrow of the Shang, and their subsequent rule.