pls add press E to close gui
Sorry, that would have side effects -- see here:
"This is the GUI that will asked to close (by firing the on_gui_closed event) when the Esc or E keys are pressed. If this attribute is not nil, and a new GUI is written to it, the existing one will be asked to close."
If I would add this, opening my GUI would close your inventory GUI etc.
It's hard to turn it off now
Did you notice the startup setting "Close GUI after character change" ("角色更改后关闭 GUI" according to your translation)? It's turned off by default. Guess I could make that a player setting, though.