Tibetan language is a written form of Tibetan language and a kind of phonography, which consists of consonants, vowels, tone symbols and word bitmaps. Tibetan has 30 letters, which are divided into three categories: initial, vowel and tone. There are three Tibetan writing methods: regular script, running script and cursive script, among which regular script is used for formal occasions, running script for general occasions and cursive script for drafts. There are two kinds of Tibetan calligraphy: positive and negative methods and non-positive and negative methods. The font written by the backward-forward method is clear, and the font written by the non-backward-forward method is smooth.
I saw many Tibetans on the Sichuan-Tibet line, perhaps some mantras or scriptures written by local people to express their blessings to the Sichuan-Tibet line or their awe of the natural environment. This behavior not only embodies the characteristics and beliefs of Tibetan culture, but also shows the magnificent scenery and mystery of the Sichuan-Tibet line, which is a very meaningful cultural inheritance and promotion.