China tour by 2 seniors

Please provide estimates of train fares n hotel charges.
Tour Date: 25 Sept to 24 October by high speed train:
1.Hong Kong to Quangzhou 10 days business class/1st class;
2.Quangzhou to Shanghai 3 days business class;
3.Shanghai to Beijing 3 days Maglev business class;
4.Beijing to Xian 3 days business class/1st class;
5.Xian to Nanjing 3 days business class/1st class;
6.Nanjing to Hong Kong business class;
7.Booking 4 star hotels near train stations;
8.Any discount for seniors?
Kind regards.