Can I travel in de first 30 days of my S1 visa, I need to go to Hongkong it's very urgent!!!!

Dear sir/Madam

I have a urgent question and I hope you can help me with it.
I arrived 30-07-2014 in china with a S1 in Ghangzhou. I will apply for my permit on 28-8-2014. The organization is doing everything for as my husband is working on the Utaloy international school in Zengcheng.
I have to go to hongkong first for personal affaire next week. Can I re-enter China without problems? After Hongkong I will go directly to ghanzhou to apply for my permit stay.