Is Xu Beihong's wife Jiang Biwei or Liao?

Jiang Biwei and Liao are both wives of Xu Beihong, but they are divided into the first lady and the second lady. According to the ancient polygamy system, it should be Jiang's wife, that is, to encourage husband and wife, and Liao's continued marriage is to continue his wife. After death, the tomb is divided into two parts, the left is the big right and the small right. According to custom, Jiang is a leftist. So I think Jiang is Xu's east wing.