Sf express working hours

Hi, I saw that you listed the SF express branch in T2 as being open 24 hours, but then on the baidu map answer someone said it's only open from 8 am until 8 pm. May I know if it's really 24 hours? I'll be transiting in gz from 10 pm till 7 am the next day so I want to be sure if I can send my package during my transit, thanks