Cheng (城) is a city with walls surrounding it. The Chinese character for cheng originally referred to inner and outer city walls built of earth, with military defense and flood control functions. Usually, it was surrounded by a moat. In ancient times, the state capital of a monarch, the fief of a prince, and a manor estate granted by a monarch to a…

Qi (vital force) has a material existence independent of subjective consciousness and is the basic element of all physical beings. It is also the basis for the birth and existence of life and spirit. In addition, some thinkers have given a moral attribute to qi. Qi is in constant motion and change, and has no specific shape. Its concentration gives …

It was thought in ancient China that a person matured through five stages: broad study for collecting information and acquiring knowledge, close examination for identifying problems and resolving doubts, careful reflection for absorbing and mastering knowledge, clear discrimination for developing concepts and reaching conclusions, and earnest practi…

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