Hanoi to Nanning

Dear Sir/Mdm,
Good day.
Could you please help to get the answer as follows :-
1. Is a train travel on 4th June, 2015 ?
2. If yes, please provide timetable
3. This train operate by China or Vietnam ?
4. May i know if this train MR1 is a daily train or twice weekly ?
5. Could you explain what is T8702 and train Z6 ?
6. visa stated enter before June 6, 2015. is that okay ?
6. Any other info that are useful
Thank you.
Regards,
OL