What does the scarlet letter on yellow paper mean?

The scarlet letter on yellow paper refers to the notice written in red on yellow paper. According to Chen Dong Anhua Marketing Network, the scarlet letter on yellow paper is common in China traditional culture, usually announcing major decisions or conveying some urgent information. The origin of the scarlet letter on yellow paper can be traced back to the Han Dynasty in the 2nd century BC. At that time, some eunuchs wrote important contents on yellow paper with red pens in order to convey urgent news to the emperor.