Hi. My family of eight are planning our vacation to Hangzhou & Shanghai in early April this year. As our family consist of some young children and retired veterans age 70's to 80's, we need advice on the weather in Hangzhou & Shanghai. What suitable clothes and foot wear to bring along to China from 1st to 10th April. What is the lowest and highest temperature. Our next vacation is to Guilin in end of May 2010. We need the same advice. Any good advice?? Thank you.