Is it possible to do this tour in the opposite direction--arriving in Hong Kong and leaving by Shanghai? Also using your services but NOT in Guilin, as I already am using someone for that part of the trip? If so, what would it cost then for the 5-star? This includes all transfers, I hope. I have my airplane tickets already arriving in China 9/18 H.K. and leaving 10/2 from Shanghai to USA. Thank you.