Multiple enters visa for 3 months?

Hi:)I would like to fly from Venice to Beijing and do a tour:Beijing-Tibet-HK with an travel agency,than fly from HK to Hanoi and we would take a bus/train to Kunming, there we will stay in Shaolin temple for 5 week (Kung fu) and after continue to Laos by bus..
However..what kind of entry permit we need?I will not fly out of China..we will go with a bus..will that be a problem for getting visa?
How much does multiple entry one costs?
I have Slovenian passport, my husband Egyptian passport..we live in Slovenia.
Thank you!