Bai Xingjian, Yin Di, Yang Da, Lok Fu, is the original text incomplete?

Yes Bai Xingjian's "Yin and Yang Fu Make Love" can't be found in the existing literature records, nor in the historical records, but it is kept in Dunhuang Grottoes in Gansu Province as a fragmentary manuscript, and the original text is incomplete. Bai Xingjian (776 ~ 826 AD) was a famous writer and the younger brother of Yi Zhi, a great poet in the Tang Dynasty.