CAN SOMEONE TRAVEL BACK HOME AND GO BACK TO CHINA WITH A WORKING VISA BACK TO CHINA WITH A WORKING

Dear sir or Madam,
Please my husband is in China with a working visa and he wants to come back to Ghana for three months and go back and continue with his work , he has been vaccinated twice in China , please I want to ask whether he can come and still go back to continue with his work...thank you