C2932 Part of World View 3 Regional Introduction

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1/04: Geographical profile

World Map :http://t.cn/zQajxlr

1/04/01: Geography (1): The Grand Wall

Since the South Pole, it had been circling the Earth once, ultimately splitting the Earth into two huge walls. Historical records were created by several ancient civilizations, and the materials used were still a mystery. They had extremely high hardness walls