The 2017 China Urban Planning Information Conference was successfully held in Wuhan from 21^stto 22^nd, September, 2017. Professor Zhu Qing made a guest report entitled "Key technologies for visual analytics of spatio-temporal Big data in smart cities". The annual meeting was jointly organized by the China Urban Planning Association and the China Urban Planning Society. Professor Zhu Qing was also invited to chair the report of the main forum on the afternoon of 21^st.