I will reach Shenzhen on 24th July 2011 Night. I wish to visit Beijing and Shanghai also.I May be travelling from Shenzhen to Beijing 25th july 2011.we are total 8 persons. I know I can take a flight, but I am keen to experience the high speed train service in china. Which is the best and economical way to travel from Shenzhen to Beijing and Beijing to Shanghai? We have return ticket from Hangzhou on 31st July 2011. If possible suggest night trains