How many movies have Song Kenan and Yan Xiaonan acted in together?

They have worked on 4 movies together! Their first movie together was UFC Fight Night 122: Bisping vs. Gastelum (2017) while their highest rated movie together was UFC Fight Night 132: Cowboy vs. Edwards (2018). They have not worked together since UFC Fight Night 168: Felder vs Hooker (2020).