Starting from the upper left corner, draw a horizontal line to the right next to the upper edge line (it doesn't coincide with the upper edge line, otherwise you can't see it clearly), turn at the vertical center line, and draw a straight line to the lower left until the lower edge line is slightly left.
7, Arabic numeral, one of the green natural numbers, is the fourth prime number and odd number between 6 and 8, which is equivalent to "seven" or "seven" in Chinese characters.
The meaning of the number "7"
As a number itself, the function of "7" is no different from other numbers, but from the perspective of folklore, "7" is often a special number in the eyes of the ancients.
In China, "Seven" is also very mysterious. People often say that "seven" is a reincarnation. Think about it: for example, there are "seven stars" in the sky seven days a week; People's feelings have "seven emotions"; There are seven colors; Music has "seven tones"; Poetry has seven words, seven quatrains and seven laws; The human body has "seven orifices"; According to folklore, the Cowherd and the Weaver Girl met at the Magpie Bridge on July 7th. In ancient times, people sacrificed every seven days after death until 7749 days later.