Chang Wei Si --- Lin Yong Jian
Chang Wei Si, the highest-ranking official in the Joint Operations Center of the Beijing Theater Command, is committed to seeking the truth and preventing panic together with the global theaters. Chang Wei Si deviates from the conventional approach by bringing in Shi Qiang, who is unconventional, to the operations center to conduct a thorough investigation alongside Wang Miao. As their understanding of the enemy gradually becomes clearer, Chang Wei Si synchronizes all information with other theaters, deploys operations, and serves as the strongest support for Wang Miao and others. Even as the Trisolaran fleet sets off for Earth, Chang Wei Si remains fearless and determined to engage in battle.
Yang Dong --- He Du Juan
As a theoretical physicist, she was the daughter of Ye Wenjie, inheriting her mother's intellect and dedication to science. Upon learning that science had been locked by the Trisolaran civilization, she discovered the truth after examining her mother's computer: Ye Wenjie was the mastermind behind the Trisolaran invasion of Earth's civilization. She also realized a darker truth than the "Dark Forest" theory: nature itself is not natural. Overwhelmed by this revelation and lacking the courage to continue living, she chose death.
Yang Wei Ning --- Tu Song Yan
Yang Wei Ning, the Chief Engineer of the Red Coast Base, has a background in theoretical physics and was a graduate student of Ye Zhe Tai, which is how he became acquainted with Ye Wenjie. He rescued Ye Wenjie from her ordeal and risked his own safety to bring her to the Red Coast Base, where he arranged for her to continue her research work. Yang Wei Ning and Ye Wenjie got married at the Red Coast Base. However, tragically, while he was repairing a cliff alongside Lei Zhi Cheng, who had discovered that Ye Wenjie had received messages from extraterrestrial civilizations, Yang Wei Ning's rope was cut by Ye Wenjie, causing him to fall to his death.
Ding Yi --- Wang Chuan Jun
He is a physicist and colleague of Yang Dong, as well as her boyfriend. One of the brightest minds in the scientific community, he has always been at the forefront of physics. Despite his casual appearance, he is a talented physicist with an insatiable curiosity for the mysteries of science. As Yang Dong's fiancé, he understands her inner doubts and questions. He attempts to save Yang Dong on a spiritual level but ultimately fails. He explains to Wang Miao in a popular and understandable way why physics no longer exists, thus helping Wang Miao understand and enter the "Boundary of Science."
Shen Yu Fei --- Li Xiao Ran
Shen Yu Fei is a cold and aloof member of the "Boundary of Science" group. She was once a prominent member of the Arrival Faction within the ETO (Earth-Trisolaris Organization), but when she discovered that the faction's principles completely betrayed the original intentions of the ETO, she began to lean towards the Redemption Faction. Shen Yu Fei collaborated with Commander Ye Wenjie to establish the Third Red Coast Base and attempted to solve the Three-Body Problem using the Three-Body model created by mathematician Wei Cheng. However, her actions directly threatened the fundamental interests of the Arrival Faction, leading to a tragic outcome for her.
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Ye Wen Jie ( Qing Nian ) --- Wang Zi Wen
She is the mother of Yang Dong.Influenced by her father, the idea of using science to save the country deeply impacted Ye Wenjie during her youth. Despite being deceived and harmed repeatedly, even witnessing her father being beaten to death and suffering through eight years of hardship at the Red Coast, she always carried the burning flame in her heart to pursue a higher civilization through science. While working at the Red Coast, Ye Wenjie discovered that the sun is an amplifier of radio waves. As a result, she transmitted signals of human civilization through the sun to the universe.
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Ye Wen Jie ( Lao Nian ) --- Chen Jin
On the surface, she appears to be a retired astrophysicist, but in reality, she is the supreme commander of the Earth-Trisolaris Organization. She ignited the fire but lost control over it. The organization's reckless actions against humanity made her begin to question her initial choices. However, when she learned about the true purpose of the Trisolarans—to annihilate humanity and invade Earth—Ye Wenjie's illusion of "advanced civilizations possessing high morals" was completely shattered.
Shi Qiang --- Yu He Wei
He is a seasoned, sharp-witted, and astute detective with extensive experience. Using his keen instincts, Shi Qiang unravels the connection between a series of scientist suicides and an organization called "Scientific Frontier." As a result, Shi Qiang is recruited by his former superior, Chang Wei Si, into the Operations Center to formally investigate the "Scientific Frontier," and he becomes Wang Miao's partner in the process.
Wang Miao --- Zhang Lu Yi
He is a nanomaterial scientist and also the head of the Nanotechnology Research Center. He carries the pride and dedication of a scientist. When his leading research on nanoscale blades faces challenges of high costs and inability to mass-produce, he tirelessly seeks breakthroughs. He becomes entangled in a series of inexplicable events due to his involvement in nanotechnology research. Everything he experiences in the game and reality influences each other, ultimately leading him to uncover the truth behind it all.
Zhang Zhu Ren --- Qu Shao Shi
Small theater reporter --- Guan Zi Jing
Small theater Mr. Bai --- Ma Shu Liang
Han Jiao Shou --- Zhang Gong
Hu Xiao Xi --- Xie Bo
Dou Dou --- Cai Ying Ying
Wang Miao's daughter.
Shao Lin --- Pan Xiao Li
Hong An Xiao Zhang --- Li Ming Ming
Ye Wen Xue --- Yu Xin Tong
Hai Ning --- Wang Yu Zheng
Trimaran Fleet Man --- Yang Lei
Secretary-General of the United Nations --- Bai Yi Cong
Qin Tai Shi Ling --- Tang Jia San Shao
Qin Xin Hao Guan --- Ma Dong
Qin Shi Huang --- Ji Chen
Bei Xi Ji De Lu Ren --- Gao Ya Lin
Mo Zi Bao Xin Ren --- Fei Zhen Xiang
Mo Zi Ji Lu Yuan --- Liang Zhen Hua
Kong Zi --- Hou Hong Liang
Mo Zi --- Yu Yang
Chancellor of the King --- Hu Jie
Da Ji --- Cai Jia
Fu Xi --- Jiang Nan
Zhou Wang --- Guo Jing Yu
Li Mang --- Zhu Jian
Zhu Ming --- Zhang Ming En
A follower of King Wen of Zhou --- Li Ming Ming
King Wen of Zhou --- Han Qing
Sha Rui Shan --- Kong Lian Shun
Chen Xue --- Wang Wei
Wei Cheng --- Zhao Jian
Xu Bing Bing --- Li Ze Hui
Mike Evans --- Ke Nan · He Pei
Pan Han --- Zhang Jun Ning
Pan Han was a renowned biologist and one of the prominent members of the "Boundary of Science." During the final gathering of the Earth-Trisolaris Organization (ETO), he was killed when one of the guards, who was loyal to Ye Wenjie, the leader of the Arrival Faction, snapped his neck.
Cheng Li Hua --- Kong Lin
Mu Xing --- Yang Rong
She was an independent journalist who became involved in the case of scientist suicides due to his interviews with Pan Han and Shi Qiang. He found himself trapped in a dilemma and, unfortunately, met a tragic end.
Ye Zhe Tai --- Kou Zhen Hai
He is a physics professor at Tsinghua University and the father of Ye Wenjie.
Li Yao --- Liu Min
She is a doctor and the wife of Wang Miao.
