HONG KONG: Hong Kong's main tech stock index plans to include 20 more companies as well as artificial intelligence and robotics themes to reflect changes in the industry, the firm compiling it has said. Launched in 2020, the Hang Seng Tech Index tracks the 30 largest tech companies listed in Hong Kong. It plans to overhaul its six tech themes to add artificial intelligence and robotics to the list, which would also include digital platforms, advanced hardware, cloud and frontier technology. "As Hong Kong's technology sector continues to broaden, the proposed changes aim to expand technology theme coverage, refine constituent selection, and increase the number of constituents, so the index continues to represent the evolving tech landscape," the company said. Last month, Chinese data centre supplier Zhongji InnoLight raised about US$6.8 billion in its debut, Hong Kong's biggest public offering in seven years.