What is the name of the pairs of things affixed to the door on New Year's Day?

Door god according to personal knowledge, the door god in the past is used to avoid ghosts and drive away evil spirits, folk more flow, before you can see Yuchigong - Qin Shubao such door god line. New Year, the year is rumored to be a kind of monster in the past, so people will invent firecrackers, firecrackers and so on, to scare away the legendary ghosts and monsters. But with the different generations, nowadays in some places in the countryside will retain such a tradition, most of them are not in the previous door god, pattern style endless, gradually with more festive picture content to replace it.