Travel by bus from Guangzhou to Nanning.

1) Which bus station near to Lido Hotel, Beijing Road & how to get there? Preferably bus with toilet and sleeper bus.
2) Where is the(bus)stop point station at Nanning?
3) At this stop point, where I can buy bus ticket to Hanoi, Vietnam?
4) Where is the boarding station(bus) to Hanoi at Nanning?
5) Can I buy bus ticket to Hanoi at GZ bus station?
6) Fare & type of bus from Guangzhou to Nanning (depart around 20.00, arrive 6.00 and then continue my journey to Hanoi on the same day)?