We have learnt Chinese numbers from One to Six as "一"，"二"， “三”, "四"，"五", "六". Before we jump to Seven, it is better to know another Chinese character first - "刀".
You might wonder what is the meaning of "刀", and how is it related to Seven?
Anyway, let us check "刀" evolution history first:
|Chinese character 刀|
"刀" it is a Pictograph character. Its Oracle script was straightforward to show an image of following object:
|刀 - Knife|
Chinese ancestors cleverly leave the sharp edge of invisible to actually show its sharpest edge of the weapon.
"刀" Seal scripthas curved the handle shape, as it evolved to , the upper part of the knife handle is simplified out. is quite close to what we are using now: "刀".
so "刀" means Knife. It is a cold weapon.
As usual, let us end this topic with a Chinese calligraphy art with "刀" inside.
And you might still wonder why Knife is related to Chinese number Seven - "七". You will understand it after knowing the way how "七" is created.