Xu Beihong
Xu's son, Xu Boyang, signed an affidavit that a nude portrait that had been found was of his mother Jiang Biwei. The painting 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 it was a piece created in 1983 by a student at the Central Academy of Fine Arts.