Zou Shuxian is Jiang Rongqiao's adopted daughter and one of his closest disciples. She was the one who wrote his books as he went blind. She still teaches in a park nearby the old house where Jiang lived in Shanghai. I was lucky to get an introduction through relatives, and she accepted me immediately both as a friend of the family and a disciple of her younger martial brother, Huan Dahai. We had one great session on 2015 before I had to go back to Beijing and she was headed of for Sichuan. I went back in the fall of 2016 for more.
She told me her best student and successor was Iyoku Daigo, and here is his website with information about her and the style (in Japanese).
Recent photos taken by Hans Järling, Shanghai, 2015. Older photos downloaded.