It's not even the whole Hong Kong stock exchange market (which has a market cap of HKD 28T ≈ USD 3.6T https://www.hkex.com.hk/Market-Data/Statistics/Consolidate

It's not even the whole Hong Kong stock exchange market (which has a market cap of HKD 28T ≈ USD 3.6T https://www.hkex.com.hk/Market-Data/Statistics/Consolidated-Reports/Securities-Statistics-Archive/Market_capitalisation?sc_lang=en https://www.hkex.com.hk/Market-Data/Statistics/Consolidated-... ) just apparently the half of it that consists of Chinese companies. My guess is that the author simply doesn't know that Chinese companies could also be listed on other exchanges.