How many movies have Du Yiheng and Shu Yang acted in together?

They have worked on 3 movies together! Their first movie together was Detective Dee: The Blood Tree of Chiyou (2018) while their highest rated movie together was Detective Dee: Solitary Skies Killer (2020). They have not worked together since Detective Dee: Solitary Skies Killer (2020). They are most known for their thriller films together.