China's Great Wall's oldest section has been ... Finally, the period under King Xuan of Qi, which was 350 to 301 BCE, used "fine yellow earth compacted with metal rammers" to create the walls.

The Hang Seng Tech Index has shed more than $350 billion in market value since a March high, though it has gained more than 10% over the past four sessions. While China’s rapid AI development ...