My husband and I are seniors, but we will spend 11 days in Beijing/Xian/Yangzee River Cruise in early July with our two sons, their wives, and our 11 year old twin grandsons. Do most tourists find that the heat and rain seriously interfere with sightseeing. We recently read that Beijing is the 6th most expensive city in the world. We will be on a private tour, but will we face high prices everywhere--the markets, tourist attractions, etc. We are worried.