Question on z-visa validity without residence permit

Hi, I intend to travel to China on 15 Nov, and leave on 13 Dec. I have been granted a Z-Visa because of my company. However, I don't have time to get residence permit as I have to leave again on 13 Dec. Can you please let me know if it is okay for me to stay on my Z-Visa for less than 30 days, and I do not need to apply for the temporary residence permit? Thank you in advance for your advice.