Cost of travelling in China

My Fiancé and I are travelling to china for our honeymoon in October. We are doing a tour from Beijing to Shanghai all through the country side all our tour is paid for including breakfast and lunch and all transport. We will only need to pay for dinner what is an average amount of money we should take for dinner and just an idea of how much approx you would take for souvenirs. We will be in china for 14 days.