I want to be sure which street at People's Square has the express bus to Zhujiajiano in Shanghai

I have read that there are 2 buses to Zhouziazian from People's Square. How do I know the Express Bus? Is it the blue and white bus? I have been told 2 different streets. #1 Da Gu Road and #2 Pu'an Road Jinling Road. Which road has the express bus, without many stops? I do not read Chinese.
Thank you.