planting trees and protection trees

The is my collection.
5th World Forest Conference - Issued in 1960.
I like trees And the land.
Modern people are always cutting down trees, only a few people are advocating planting trees and protection trees.
It have face value is 1 yuan and 2 yuan and 3 yuan.
The 1 yuan landscape have flying birds / mountain / river, it representing the original nature
The 2 yuan sika deer in the forest foraging.
Represents the ecology of the forest and the special animals of our country.
The 3 yuan logging -
His paintings say that the forest is can used reasonably,
That is to say,
In the 3 yuan picture, the picture is a moderate development of the forest, and the meeting is mainly to discuss the forest resources of various countries. How to develop and help each other,
For example, if everyone asks to keep the forest as much as possible, then other countries must give them assistance, etc., but I don’t like ther practice.
Because advanced countries always ask backward countries not to Felling forests, but they are severely cut down. It should be that everyone is forbidden to Felling forests, unless growth forests can reach equilibrium.