I don't have QQ.
Actually that's quite simple using 64 bit code to jmp to an absolute 64 bit address:
push imm32 (68xxxxxxxx -- high 32 bit part of 64 bit address)
push imm32 (68xxxxxxxx -- low 32 bit part of 64 bit address)
ret (c3)
The only problem is this form needs 11 bytes other than 5 bytes in 32 bit jmp.