Why is Song Xuruo's tomb called Yin and Yang Hand?

Because of the dual identity. Song Pingping was a civil servant of the Cultural Bureau, but privately he concealed the identity of the grave robbers. Because this dual identity is called yin and yang hand. The TV series "The Road to Grave Robbery" tells the true story of a grave robber in Guanzhong. The name of this grave robber is Song.