I removed efi file in less careful, after that i cannot loader grub2,I have google for a long time,but it seems that they all only working on well in MBR,not GPT,what can i do?
Procedure is the same both on MBR and EFI, you just need to be sure to boot rescue system in EFI mode and mount ESP additionally.
i did the same way just now，and i succeed,it is hard to understand why i failed in the afternoon by this way,anyway,thanks for your help,