身在曹营心在汉的英文：
[Literal Meaning]
body/at/Cao Cao/camp/heart/at/Han Kingdom
Guan Yu thought of Liu Bei while being imprisoned in Cao Cao's barrack.

[解释]
汉：汉朝。原指关羽虽然身在曹营，但心里想着刘备。比喻身体虽然在对立的一方，但心里想着自己原来所在的一方。

[Explanation]
to work on one job but long for another

[例子]
我看你是身在曹营心在汉，还想回到原来的公司。

[Example]
Though you are working for us now, I think you still want to go back to your previous company.