Bus schedules from Tangkou (Huangshan) to Hangzhou

Please tell me all of the daily time schedules for the buses that go direct from Tangkou bus station (not Tunxi) to Hangzhou city and how long is the bus ride? Is it faster to take a bus from Tangkou to Tunxi, then the Express (fastest) bus from Tunxi to Hangzhou? We will be at the bus station in Tangkou at 1pm (+/-).