Zhuānxīn ɡōnɡzuò.
专心工作。
Keep your mind on your work.
Notes:
专心(zhuānxīn): keep mind on
工作(ɡōnɡzuò): work
Example:
A:你昨天去酒吧了吗?
Nǐ zuótiān qù jiǔbɑ le mɑ?
Did you go to bar yesterday?
B:专心工作。
Zhuānxīn ɡōnɡzuò.
Keep your mind on work.