Actors Zhang Ruixi and Zheng Xiyuan will play a sister-in-law couple in the movie “The Secret of Things” (Director: Li Yingmei). The love film “The Secret of Things” directed by the new director Li Yingmei who graduated from the British National Film School, tells a sincere and unique perspective of a young man who is full of charm and suddenly approached him and a woman in her 30s s story.