Do they accept client from Hongkong?

https://www.keytomarkets.com/lat-eng/

key to markets is a brand with subsidies authorized and regulated by different regulatory bodies, including:

KEY TO MARKETS INTERNATIONAL Limited, regulated by the Financial Services Commission of Mauritius (Mauritius FSC) as an Investment Dealer with licence number GB19024503. 

KEY TO MARKETS Limited, regulated by the UK Financial Conduct Authority (FCA) under reference number: 527809.

As for the question you asked, we recommend that you ask the official customer services directly for a more accurate answer. For more details on this broker, please check our full key to markets review.