“To seek knowledge, even as far as China.” For Samy Kaci, the mysteries of black holes, neutron stars, and ultra-high-energy cosmic rays possess precisely this kind of magnetic pull—so powerful that an age-old proverb from his homeland has found real expression in his own life.

Three years after crossing thousands of miles to China, this young scholar from North Africa has not only begun to shine in the field of astrophysics, but has also inspired his younger brother to follow in his footsteps. Together, they have rooted their shared scientific aspirations in Shanghai.

In his view, this chapter—pursuing science side by side in China—will undoubtedly become the most special part of his China story.

From an Ancient Proverb to Living Reality

Inside the Tsung-Dao Lee Institute at Shanghai Jiao Tong University, Samy Kaci from Algeria focuses intently on his computer screen, analyzing the latest data on ultra-high-energy gamma rays in the Milky Way. Having crossed nearly 10,000 kilometers to China, this North African scholar is searching for answers in the study of high-energy Galactic particles.

Samy’s academic foundation was built in North Africa. During his undergraduate and master’s studies, he specialized in fundamental physics and condensed matter physics, graduating as an outstanding representative of University of Science and Technology Houari Boumediene.

“To seek knowledge, even as far as China” is a proverb from his hometown. Since childhood, it symbolized his unwavering determination to pursue knowledge. He never imagined that one day this ancient saying would resonate so vividly in his own life.

While studying in North Africa, he learned about the Chinese-led Large High Altitude Air Shower Observatory (LHAASO), located in Daocheng, Sichuan. As one of the world’s most sensitive gamma-ray detection facilities, this major international scientific project led by Chinese scientists presented unprecedented research opportunities.

In 2022, Samy crossed both geographical and cultural boundaries to begin his PhD in astrophysics at the Tsung-Dao Lee Institute. There, with cutting-edge perspectives and persistent dedication, he explores the mysteries of the universe, striving to leave his own mark in the vast cosmos of astrophysics.

Emerging Brilliance in Academic Research

Samy’s research focuses on particle astrophysics—using principles of particle physics to explain how extreme astrophysical objects such as black holes and supernova remnants generate ultra-high-energy particles within the Milky Way. This work relies heavily on powerful computational capacity for data analysis and numerical simulations.

Upon arriving at SJTU, Samy was struck by the modern research environment. “The world-class observation facilities and computing power here allow us to reach the frontiers of the universe,” he said. “Strong computational resources are crucial for complex data analysis and simulation experiments.”

The institute also fosters a dynamic academic ecosystem: weekly group meetings, regular international seminars, and collaborations with leading laboratories worldwide create an environment where ideas spark through dialogue. According to Samy, studying at the Tsung-Dao Lee Institute means having broader platforms to communicate with global peers and more opportunities to present research at international conferences—experiences essential to advancing his scientific capabilities.

One distinctive academic activity is the weekly Journal Club. Over coffee and pastries, professors and students gather in small groups to discuss research topics freely. “There is no rigid reporting structure,” Samy explained. “The environment is relaxed and equal—like friends chatting. Everyone is eager to participate.”

In this open and innovative atmosphere, his research has borne fruit. A paper he co-authored with his French advisor, Gwenael Giacinti, was published in the prestigious astrophysics journal The Astrophysical Journal Letters, bringing him a strong sense of accomplishment.

Beyond his individual research, Samy also participates in the TRIDENT project—the Hainan deep-sea neutrino telescope initiative. “Chinese scientists are uncovering the deepest secrets of the universe, and I am fortunate to be part of this process,” he remarked with anticipation.

Language is the bridge to cultural integration. Shortly after arriving in China, Samy began studying Chinese. Although English is widely used at the institute, he realized that mastering Chinese is essential for fully understanding the culture. “It’s like doing research—it requires patience and practice,” he said.

To that end, he joined “Speaking@SJTU: JoinJoy”, a language community organized by the university’s International Student Service Center. By making Chinese friends, helping local students practice English, and participating in various cross-cultural activities hosted by the Tsung-Dao Lee Institute, he has steadily improved his Chinese proficiency. Later, during a karaoke event, he experienced the rhythm and aesthetic beauty of the Chinese language through song lyrics—an experience he treasures deeply.

His understanding and experience of China extend far beyond the campus and laboratory. Over the past three years, alongside his academic work, Samy has traveled to cities such as Nanjing, Chengdu, Hangzhou, and Taicang, discovering the distinctive character of different regions across the country. These journeys have allowed him to appreciate contemporary China from multiple perspectives—its diversity, openness, and vitality—with each trip deepening his connection to the land.

“China is like a long scroll painting,” he reflected. “You can see ancient traditions and feel cutting-edge technological progress—all coexisting harmoniously.”

Writing the Most Special Chapter of His China Story

Samy Kaci and his younger brother at an international student luncheon hosted by the Tsung-Dao Lee Institute

In 2025, inspired by Samy, his younger brother Mehdi Kaci chose Shanghai Jiao Tong University as his own academic destination. He was admitted to a master’s program and joined the same research group.“This may be the most special chapter of my China story,” Samy said, his eyes lighting up. “To conduct research in the same country, the same university, even the same group as my brother—it’s incredible.”

Five years apart in age, the two brothers have shared a close bond since childhood. Back in Algeria, they often discussed scientific questions together, and Samy’s curiosity about the universe profoundly influenced his younger brother.

After coming to China, Samy frequently called home to share updates about his research and his experiences living abroad. As he spoke with enthusiasm, his brother gradually developed a growing aspiration to study in China as well.

Their parents were delighted that the two could pursue their studies together and look after one another. “In Algeria, separation among family members is a significant matter,” Samy explained. When their parents learned that the brothers would reunite in China and embark on promising academic journeys, they ultimately felt both reassured and proud.Now a first-year master’s student at SJTU’s Minhang Campus, Mehdi occasionally meets Samy for dinner or tennis. Their conversations still revolve around academic growth and shared progress.

Samny participating in the “Elites of International Students” award

Two months ago, Samy stood on the stage to receive the 2025 Shanghai Jiao Tong University “Elites of International Students” award—one of only five international students honored that year.

“It is a great honor,” he said. “This recognition is not only for my personal efforts, but also an affirmation of international students as a whole.”

Now in the latter half of his PhD journey, Samy’s immediate goal is to complete his dissertation, which is closely related to the LHAASO project. He is also studying AI-assisted deep learning techniques, hoping to apply these emerging methods to astrophysical research.

Looking further ahead, he hopes to continue exploring the path of scientific research. “The universe has no boundaries; science knows no frontiers,” he often says. This light-seeker from Algeria has found his research stage—and a second home—in China. And the story of two brothers pursuing science together continues to unfold.

For him,

“The universe has no boundaries; science knows no frontiers”

is not merely a belief—

it is the path unfolding beneath his feet.

The scientific dreams of this young Algerian scholar and his brother

have taken deep root in this vibrant land.

Source: Youth Daily; Tsung-Dao Lee Institute; Student Affairs Committee (International Student Service Center)

Reporter: Liu Xinlu

Editor: Wang Yutong

Editor-in-Chief: Chen Chen

Translated by: Denise

Proofread by: Rebecca

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