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There are several cross-sea bridges over the Pearl River Estuary. World-class mega project the ShenZhong Link is not just a part of China's transportation infrastructure; it represents Chinese constructors' self-transcendence and extreme challenges in science, technology and engineering. Why did the designers of the ShenZhong Link chose the scheme of "tunnel in the east and bridge in the west"? Let's ask Alan, the AI anchor of ZICC.