President Xi Jinping opened China’s 15th National Games in Guangzhou on Sunday, on a night filled with symbolism and heavy on emphasising the role the Greater Bay Area will play in the country’s future. As might be expected from an opening ceremony at a major sporting occasion in China, there was a stunning mix of old and new on display, with water at its centre and fire at its end. Hong Kong, co-hosting for the first time in its history, was well represented too, not just by its athletes and...