Best route to travel from Shanghai to Huangsan, Suzhou and Hangzhou within a week?

If you go back to Shanghai at the end of the tour, then the best route is Shanghai - Huangshan - Hangzhou - Suzhou. If you want to leave the country in the end, then the best route is Shanghai - Huangshan - Suzhou - Hangzhou. One week is ok for you to visit these cities.