– The picture displays the word “time" in a beautifully designed font. It is large enough to cover the full width of the picture, making it thus “long." Under the word there are all the letters of the alphabet on three rows. However, if you look closely, there is no letter “C" among them. This is a word – play, as you need to understand the missing “C" letter in its phonetic form “see". In other words, “long time, no see."
– This is a greeting expression, used between people who haven’t seen each other in a long time.