Go out from the small gate of the school hospital, pass through Wenzhou Village, and get on the bus at the East China Ceramic Building Materials Market Station. Take the K900 and get off at Yan'an New Village. Yan'an New Village is right next to Wulin Square. You can go to Wulin Square. Take a look, and then stroll along Yan'an Road, mainly Yintai and so on. You can stroll all the way to the lakeside, watch the musical fountain, and then take a boat trip to the West Lake from the Lakeside Pier.
Note that the last K900 bus back to Zijingang leaves from Chengdu Station at 9pm. If it is late, you have to go to Wulin Square and take K211, which is a night bus.