Do the No.5(306) buses run after 7:00 am?

Hi, I will arrive with my family in Xian by train at 7:34am. I was wondering if there are more buses that can take us to see the warriors, besides the No.5(306) that leaves at 7:00. Is there a schedule? If not, what would be another way to go from the railway station to the warriors? Also, are there buses to take us back to the railway station? We will leave the same day (that night). Thank you!