One kind is "suggestions on XXX", such as "suggestions on the planned operation of the company in 20 17". Although there is no mandatory explanation in this guiding official document, it is basically equivalent to implementing it according to this, just saying that there is no such official document. (The suggestion is not as formal as the red-headed document. )
The second article is more formal and mandatory than "proposal", and it is called "resolution on XXX", which is literally understandable. One is a suggestion and the other is a resolution. For example, the resolution on the implementation of traffic control measures in XX city.
Third, "instructions"-usually instructions for a specific job, focusing on a certain point.
Fourth, reply. This is easy to understand. Subordinate units have something to ask the leaders for instructions, and the leaders give approval opinions on this matter. This belongs to the form of question and answer.
There are probably four common types of leadership guidance documents, others are partial and it is impossible to list them one by one. After all, the situation is different everywhere.