Water Bus at Hangzhou. Does anyone know the ticket price for this?

Night Schedule: The boat departs at 19:30 from Wulinmen Wharf to Genshanmen Wharf. After a round trip from the two wharfs, the boat will go ahead to Gongchenqiao and finally go back to Wulinmen Wharf. The whole journey will last one hour and 40 minutes.

Thank you