ní​guì​zhēn

Ni Guizhen or Ni Kwei-Tseng , mother of Song Ailing 宋藹齡|宋蔼龄[Sòng​Aǐ​líng], Song Qingling 宋慶齡|宋庆龄[Sòng​Qìng​líng] and Song Meiling 宋美齡|宋美龄[Sòng​Měi​líng]