You can take bus No.686 from Hung Hom Apartment to Qilitai/Balitai/Tianta and transfer to bus No.0/2, and then take the small circle bus to Ling Zhuangzi Terminal (Pengtiange Restaurant). Go straight ahead and you can reach Renaimen. The big circle car can go directly to Ling Zhuangzi Station (near the south gate of Shuidi), and get off and cross the road to Renai Gate.

Or take bus No.686 at Hung Hom Apartment and change to bus No.878 at the North Station of the Institute of Physical Education and get off at Ling Zhuangzi Station.