As shown in the picture.

1. Find the roughly east-west position of the Pamir Plateau and the Liaodong Peninsula (Lvda), thus determining the westernmost point of China and the southernmost point of Northeastern China,

2 . Find the relevant positions where Luda and Mohe are roughly in north-south correspondence. The north-south distance is about 1/3 of the above-mentioned east-west distance. This determines the northernmost point of Northeast China (also China). According to the three locations of Mohe, Pamir and Leizhou Peninsula, The relative position of the earth roughly forming an equilateral triangle is used to determine the southernmost point of mainland China.

3. Based on the fact that the northeast corner and northwest corner roughly correspond to east and west, determine the northeastern end and northwest end of China. In this way, by memorizing the above-mentioned corresponding points, you can roughly control the characteristics of the graphics of mainland China, and then connect the various control points to form the outline graphics of mainland China.

Boldly cut out content that has nothing to do with teaching, but things that reflect the characteristics and spirit of graphics should not be cut off easily. For example, the sharp corners at the northeast and northwest ends of the outline sketch, as well as the Pamir at the west end, the Leizhou Peninsula at the south end, and the Shandong and Liaodong Peninsula in the east, must be retained. Otherwise, the characteristics of Chinese graphics will not be reflected and the graphics will be distorted. Loss of spirit.

azimuth orientation:

The orientation and orientation of Chinese maps are generally consistent with other maps, that is, true north orientation (true north faces the top of the map). Occasionally there are some situations, such as being affected by some map projection deformations or making maps such as bird's-eye views from different directions. In this type of China map, the due north direction may not be at the top of the map.