Who played Yan Yan all my life?

Chen Zhiyan, a small rattan, played all his life. In the TV series "Life", Chen Zhiyan, the actor of Fujii Koji, took part. Chen Zhiyan plays Yan Yan, the neighbor sister of Shanghai hostess's family, in the TV series "All My Life". In the twenty-third episode, Yan Yan once took a piano and asked her sister to help tune the strings.