The so-called ambigram refers to: when the text is reversed, the font will be exactly the same. There is another way: the positive view is one word, and the negative view is another word.

Ambigram is not only a form of exchanging words with words, but also a form of words that can be read and illustrated from different directions. There are many different forms of bidirectional word and directional pattern, but there are also different forms of bidirectional word and directional pattern.

Source: @_arturoe