"green outing with care of the environment", These bikes are provided by the bus company in hangzhou.
It's free in 60 minutes, over 60 minutes you can pay by the bus IC card:
60~120 mins, 1 yuan;
120~180 mins, 2 yuan'
after 180 mins , every one hour will be charged of 3 yuan.
And if the borrower use the IC card to take the bus during his rental period, there's some discount additionally.
The bikes looks new and clean. Hangzhou is really a friendly city for tourists.