It is suggested that Hangzhou Station take the high-speed train and get off at Tongxiang Station.
The high-speed railway Tongxiang Station has K282 directly to Wuzhen.
This is the most convenient.
It is really not recommended to take a bus to Hangzhou Passenger Transport Center. It takes at least 1.5 hours to get to Hangzhou Passenger Transport Center by car from West Lake, and there will be traffic jams.
There are few buses from Hangzhou to Wuzhen, 45 minutes-1 hour. Bus fares are more expensive than high-speed rail.