"Jiu" is originally a simple form of "mortar". It is also written in cursive script like this now, but it is not written like a "丨" plus a "日". They are separated. It is considered to have evolved from the cursive writing style. Come "cursive script and regular script". Japanese characters such as "稲" and "児" are written in this way. In the past, people often used a homophone with a few strokes (usually part of the original character) to replace a character with many strokes without causing ambiguity. So I feel that there are many traditional Chinese strokes for "老", and it is often abbreviated to just the character "邴", just like the simplified way of using the characters "er", "guang", and "bian". In this way, the traditional Chinese character for "老" is written as "邵", and "邂" is written as "老". When formulating the simplified characters, we followed the principle of "state without writing" and recognized such vulgar characters, so we simplified them into " old".