I am travelling to China from 9 - 29.9.. Beijing 10.9. - 17.9., Xian 17.9., Yangtze River cruise from Chongqing - Yichang 19.9. - 22.9.and Shanghai 22.9. - 29.9.. What is the climate at this time of the year in these areas and will the monsoon season / flooding have subsided by 22.9.? Also will the Shanghai - Nanjing high speed rail link be operational when I am in Shanghai? What is the cost of a return ticket to Nanjing?