Guangzhou Airport shuttle bus number 1 - is it still available around 5am?

Hello. what is the exact time table for the line 1? what does last flight mean? it says here first run / final run: 7:00/the last flight? I will arrive the airport at around 5 am, and to my flight back, I need a bus ride airport-bound around midnight or 2am? Does anyone here know if it is still available?

Also, is there a waiting area for early passengers at the airport? (not lounge, because I am not qualified to any lounge). Thank you so much and I will appreciate a reply.