Thanks for your help!
I did it few times, but always Emax said OS is SE1.1…
after that I read an old issue,someone uploaded ZD700 disk includes plus1.0 OS.
then I downloaded ZD700 and do HxC converter, it works now!
I am confusing .emx OS file and .em1, also how to use HxC software(batch converter,load raw image,etc…