my visa X2 permitted me to stay on china till Sep 30, 2016. may i come and back to china before 9/30

i got chinese X2 type which let me stay in china till Sep 30, 2016. then now (june 26) i am flying to indonesia and will ne back to china on july 23. for this travel should i provide new entry permit? what type i should provide, since i will extended my resident permit before Sep 30?.
(Yusran, Indonesia)