How much is the taxi fee from Beijing airport T3 to Novotel Beijing Peace? Do the attractions like the Forbidden City open from Feb 04 to Feb 07?

My family will be arriving Terminal 3 at 1 am of February 4, 2011. How much is the taxi fare from T3 to Novotel Beijing Peace at 3 Jinyu Hutong Wanfunjing 100006 Beijing China. are the forbidden city, tianemen square, temple of peace and greatwall of china open from feb 4 to 7, 2011? what mode of transportation is cheaper if we plan to go from Beijing to Shanghai? what activites do we expect from chinese spring festival in Beijing?

Thanks.