In the field of linguistics, you can also mean "seeing you". In English, "see you" is usually abbreviated as "CU" or "CY". CY is also commonly used as the abbreviation of "cheers, yours" in e-mail and social media to express greetings or signatures.
In a word, in any case, C You is a simple but expressive language usage, which includes not only seeing your greetings, but also warm greetings and the concern of the greetings. In addition, C You also shows the creativity and openness of bilingual young people.