May I know what is the bus number to take from Suzhou Railway Station to Zhouzhuang Water Town?

1. Oh, actually, it's not necessary for you to know the bus number. There are many direct coaches depart from North Square Bus Station (near the railway station) that can take you to the water town. The schedules are from 6:45 to 17:50. The duration is about an hour.
2. From Railway Station to Shantang Street, take subway line 2 to get off at Shantang Street, Exit 1. Then walk southeast around 700 yards.