Letters are the only parallel texts in official documents, which are listed as the main terms in administrative documents and official documents of party organs, and sometimes they can be used between lower-level organs. For example, the superior asks the subordinate about the situation and so on.

Features of the letter: 1. Equality and communication II. Flexibility and universality. Simple and practical.

Notice is the most widely used language, and it is listed as the main language in the administrative documents and official documents of party organs. It is used to issue internal party regulations, appoint and remove cadres, convey instructions from superiors, forward official documents of higher authorities and non-lower authorities, approve the forwarding of official documents of lower authorities, and issue matters that need to be handled by lower authorities and relevant units or are well known.

Notification features: 1. Diversity of functions. Widely used. Must guide 4. Strong timeliness.