Dear @Jack King Song i know this wasnt your decision but i would like to relay message to your upper managment:
"Dear Kingsong you do not know what youre playing with. Losing customers which you will is the least of your worries.
Until now, EUC hacking hasnt been deemed necessary since apps like Darknessbot and EUC World provide a lot of options.
But you just issued a challenge here to every hacker/programmer on the planet. I sincerely hope it will be the EUCW or Darknessbot getting hacked for your sake!
Because the other option is Custom Firmware on any Kingsong EUC. If you continue this practice it will happen eventually!
And in 2 years your brand might become synonymous with custom firmware and im not talking about unlocking. Im talking about people getting remove speed limits, tilt cut-out angle completly and other potentionally dangerous stuff.
It might happen that what ever control you have over safety and limitation of your products will be gone completly.
You playing with fire here and you should stop while you can, if its not too late already!"