Triple room

Dear,

Together with my 2 children, aged 20 and 17 year I would like to discover China August 2015 as birthday present for my son who turns 18 next year.

Is there a reduction or an additional cost for a triple room?

We prefer the combination, culture, action (possibility to bike through rice fields), nature (rivers/mountains/beaches), is the "dreamlands & Yangtze" in that case the best option/most complete tour for us?

Kind regards from sunny Belgium!