HM and ZARA are in Li Xing Shopping Center on Hubin Road. At the location of the fountain by the West Lake in Hangzhou, go straight across the road and you will find the shopping center on the right of the second intersection.
ZARA has a big shop on Wulin Road. It's on the edge of Wulin Road. It is easy to find
HM is in Yintai, West Lake. It's located in a shopping center not far from Wu Shan Square.