Shares in Chinese data centre supplier Zhongji InnoLight tumbled more than nine percent in its Hong Kong debut on Thursday, after raising at least US$6.8 billion in the city's biggest IPO for seven years, driven by a demand for AI components. The Shenzhen-listed firm priced its shares at HK$980 on Thursday, raising about HK$53.4 billion (US$6.8 billion), the most since Chinese tech behemoth Alibaba listed in the city in 2019.