On May 21, the Chinese TV series "Evidence" officially started filming and announced the cast.
As previously rumored, Luu Vu Ninh and Ton Hong Loi are confirmed to be the 2 main actors who signed the first names of the project.

However, what surprised many people was that Vuong Ngoc Van, who had previously appeared in the cast list, suddenly "disappeared", and her replacement was Truong Nghe Pham - introduced as the number 1 female lead.
This change immediately sparked online debate, the topic "Wang Yuwen loses role" climbed straight to the hot search top of Weibo.
Vuong Ngoc Van's office immediately posted a notice, stating that because the actual filming schedule after the film crew adjusted was in conflict with the work schedule previously signed by the actress, after friendly exchange with the film crew, she temporarily did not continue to participate in this project.
However, the explanation from Vuong Ngoc Van's side could not completely extinguish the mixed public opinion about her losing an important role.
Meanwhile, "Thiet thuong" is a key crime film project, directed by the Central Political and Legal Affairs Commission of China, and funded by the Cultural Industry Development Support Fund under the Central Propaganda Department.
Many viewers discovered that although Vuong Ngoc Van and Truong Nghe Pham both graduated from the Beijing Dance Academy, their majors were completely different: Vuong Ngoc Van studied musical theater, while Truong Nghe Pham was the valedictorian in ballet, with 11 years of formal ballet training.
And the character Han Yongyu in "The Witness" needs many ballet scenes with high difficulty. Previously, director Yu Bai once assessed Zhang Yifeng as "acting flexibly, not afraid of cameras", so many people think this is one of the reasons Wang Yuwen was replaced.

Besides, Vuong Ngoc Van's position in the entertainment industry is also being discussed. According to the media, this is not the first time she has missed a quality project.
Previously, the female lead role of the movie "War and People" was initially aimed at Vuong Ngoc Van, but she eventually switched to Giang So Anh.
Continuously losing the female lead role in major film projects, having no new films to shoot for a long time, the heat from entertainment shows cannot be converted into film resources - the acting path that once went up steadily of the beauty born in 1997 is currently in a state of stagnation.
From March 2025 to now, Vuong Ngoc Van has not joined the new film crew for 15 months, so in reality, there is no such thing as a tight schedule or work conflict as the office explains.

According to QQ, Wang Yuwen's current difficulties are the result of 3 overlapping factors: limited expertise, wrong development planning and fierce industry competition.
The film industry today is no longer an era that relies solely on beauty and fame, but is shifting to the trajectory of "suitable roles are top priority, professional competence is king".
The film crew no longer indulges in the fame of actors, but focuses on the level of role suitability and quality of the work.
Vuong Ngoc Van has been acting in romance movies, ancient costume idols and urban movies for many years - looking diverse but lacking a truly outstanding forte.
When encountering quality drama roles that require specialized skills and breakthrough acting, she is very easily replaced by more professional and suitable actors.