How to hide value in field

Hello,

it is possible to show the format-date-time(now(), ‘%Y%m%d%H%M%S’)) value after inputting another integer number from another field? for example this 2 fields: ARV Code and ID Code
image
The ARV CODE = integer
The ID Code: auto-generate using format-date-time(now(), ‘%Y%m%d%H%M%S’))

when we start the form, then I want to hide only the date and time value (only show ID Code blank field) in ID Code (not the whole field) and the value will appear after inputting any number in the ARV Code field.

I try to use skip logic as well as disabled = TRUE, but it is completely hidden the whole field. I just want to hide only the value.

thanks
BL

@chenboly, could you share the relevant part of the XLSForm with the community?

Thanks @Kal_Lam here is the screenshot of XLSForm.