What did the ancients in China mean by fitness?

In ancient Chinese, "Shi" is a polysemous word, which can mean both appropriateness and appropriateness, as well as arrival and progress. In ancient poetry, we can often see the usage of "to my liking" and "to have enough to eat", which means to satisfy personal wishes or meet dietary needs. When traveling or on business, passing by a place, you can also use "fitness" to indicate that you have arrived at a place.

In ancient times, fitness could also mean "fit and fit". For example, "marriageable" means suitable for marriage and eligible for marriage. At the same time, the words "suitable for entering the DPRK" and "suitable for being an official" usually mean that they meet the conditions of the political, social and cultural environment at that time and are qualified to hold certain positions.

In addition, fitness can also mean "appropriate and timely". For example, when treating diseases, ancient doctors often advised patients to "eat moderately" and "exercise moderately", that is, to properly grasp the amount, time and moderation, otherwise it would affect the recovery of diseases. Therefore, the ancients often said that "extremes meet" and stressed that a reasonable life and work are the key to health and happiness.