I'd set a trial credit now for your account. :-) So I think you can use all mudfish nodes and features for a while. Please let me know if there's any problems and questions.

Hi, thank you very much for the trial credit. How do I use the features? I tried to equip but can't do anything...?  Also, I am based in Beijing at the moment, do I need to use VPN to use Mudfish...?

For most of cases, I don't think you need to use other VPNs.  Please confirm that How to check the basic functionality works fine in your environment. It's a first thing you should test.