Where can I find the special tourist buses in Suzhou and how much does it cost?

There are 7 sightseeing bus routes in the city nowadays. The ticket fare is CNY 3 per time. You can get on the bus at any one stop.
Here are main stops of these lines:
Line 1:Zhuo Zheng Yuan Transfer Center, Museum, Main Railway Station, North Bus Station, Tiger Hill Wedding City
Line 2:Guanqian Street, Canglang Pavilion, Panmen Scenic Area, Lion Grove Garden
Line 3: Lion Grove Garden, Xuanmiao Taoist Temple, City God Temple, Shantang Street
Line 4: Pingjiang Road, Main Railway Station, Lion Grove Garden, Jinji Lake
Line 5: South Bus Station, East Guanqian Street, Zhuo Zheng Yuan Transfer Center
Line 6: Shantang Street, Hanshan Temple, Lingering Garden, Tiger Hill Wedding City
Line 7: Lion Grove Garden, Museum, North Bus Station, Main Railway Station, Shantang Street, Lingering Garden, Hanshan Temple and Amusement Land