13 steps (13) (Rerun in English)

Thirteenth step: Tiger crawling
Lie on your stomach, and make your body parallel to the ground. Your hands and feet are on four spots apart. Your arms and legs bent slightly, then start walking forward slowly. Think over your weight and strength, walk for 10 to 30 steps forward.

Hypothetically, when the ground is as transparent as glass, your pose will be like the second figure in the graphic.

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The End