The index finger, middle finger, ring finger and little finger are close together. What do the middle finger and ring finger stand for respectively?

Vulcan, originally from Star Trek, raised his hand to express his greetings from another planet. Vulcan people usually say "long life and prosperity" when making this gesture. Nowadays, many foreigners make this gesture, which should be extended to "you are from another planet", "you are a geek" or "we are from the same another planet, and we have the same hobbies".