Xu Beihong
Xu Beihong painted several portraits of Jiang Biwei, including a 1933 painting which is now in Kyoto. Their son, Xu Boyang, signed an affidavit that another portrait that had been found was of his mother. The painting of the nude Jiang was then sold for approximately $11m in 2010 at Beijing Jiuge Auctions. After the sale it was claimed that the painting was not by Xu Beihong, but rather was a piece created in 1983 by a student at the Central Academy of Fine Arts.