If you take a bus, you should take bus No.5 or No.6 to any stop on Renmin Road, and then take bus No.2 to Shuangshui. Why don't you take bus No.5 to Huangtupo first, and then transfer to bus 1. Some 1 and 2 buses don't reach Shuangshui, please ask before boarding.
I don't know the time. It may take 1 hour if there is no traffic jam for 30 minutes.
The best route, take bus No.6 and get off at Changba intersection, then transfer to bus No.2 at Changba intersection and get off at Shuangshuichezhijia station, and then walk 200 meters in the alley. Time is also the most economical.