2. Marvel Comics: When the walker found the boundary pillar, he was shocked and surprised. Readers can show awe and wonder at nature and human wisdom.
3. Thinking: The walker began to think about the meaning of life and existence through the discovery of boundary markers. Readers can show philosophical thinking and thinking about the meaning of life.
4. Feeling: The walker finally realized the truth that "the boundary marker is not the end, but the starting point", and the reader can show good expectations and feelings for life and the future.