In short, public signs can be defined as cardboard or metal signs in public places that provide information to the public and regulate public regulations. (Liu Xiaoping, 2009:21)
In summary, public signs can be defined as cardboard or metal signs that provide information to the public in public places and provide public norms. (Liu Xiaoping, 2009:21)
In a word, public signs can be defined as cardboard or metal signs in public places that provide information for the public and stipulate public norms. (Liu Xiaoping, 2009:21)