The word "Yan" we use today is an "ya" with an apostrophe. If our Chinese character is a pictographic system, then no matter how you look at the word, you can't see anything pictographic, or it can't cause any association. But in traditional Chinese characters, the structure of the word "Yan" is not like this. Traditionally, it is written as "Yan", with two words "mouth" above, one word "factory" in the middle and one word "dare" below. This reminds me: what kind of mentality did the ancients have when they invented this word? As can be seen from the traditional Chinese characters, it must have a "mouth", and there is more than one "mouth", even as many as three "mouths" in Dazhuan! Then there is a word "factory" in the middle, which means you have to live in the right place. The key is that at the bottom of this word, it is a brave word "dare". Looking up the etymology, the word "Yan" is explained as follows: "Know the word. From the second mouth, there was a sigh, indicating that the education law was urgent; It means it's urgent This means close, strict, strict and serious. "