What is the difference between official letter paper and ordinary letter paper in VI design?

I don't know what to say to make it clear ~ ~ In short, official letter paper is the stationery of important notices and announcements issued by enterprises or companies to departments at all levels. Generally, its requirements are very strict, with black, gray and red as the main colors ~ (you can check the official letter pictures ~)

Writing paper is different ~ in VI system, writing paper also includes corporate logo, auxiliary color and so on. It's a little similar to the type of publicity, representing a face of the enterprise ~ like this picture/me? ct=5033 16480。 z = 0 & amptn = baiduimagedetail & ampD6 % BD % C9 % E8 % BC % C6 & amp； in = 9386 & ampcl = 2 & ampcm= 1。 sc = 0 & amplm=- 1。 pn= 1。 rn= 1。 di=37694200 1。 ln=269

I hope it helps ~