Luggage storage in Tunxi Bus Station and Tunxi Railway Station

We will be travelling (group of 4 Malaysians) from Hangzhou to Tunxi by bus and plan to go up Mt. Huangshan and village Xidi and Hongcun villages for the next 3 days. We would like to leave our big luggage at either Tunxi Bus Station or Tunxi Railway Station for 4 days. Please advise whether there is any safe luggage storage facilities at the Tunxi Bus Station or Tunxi Railway Station and the daily rate. Thank you.