In Loving Memory of
Dr. Zhiguang Xu
(November 3, 1971 – March 31, 2026)
Dr. Zhiguang Xu was born on November 3, 1971, in Beijing, China, with ancestral roots in Changchun. He was a professor of computer science. He passed away on March 31, 2026, at his home in Orlando, Florida, at the age of 54.
His father was an expert in civil engineering and earthquake-resistant design, and his mother was a specialist in polymer chemistry. He attended Sanlihe No. 3 Elementary School and later Beijing No. 44 Middle and High School. His youth was filled with memories of Yuyuantan Lake, swimming, soccer, and long bicycle rides.
In 1990, Dr. Xu was admitted to Beijing University of Posts and Telecommunications, where he majored in computer software. During his four years there, he was known for his sincerity toward others, diligence in his studies, and enthusiasm for life, leaving a bright and lasting impression on campus. His kindness, humor, resilience, and sense of responsibility remain cherished memories among his classmates.
From July 1994 to November 1998, Dr. Xu worked at Nortel Networks. He was one of the key members of the China National Wireless Network Management System project.
At the end of 1998, Dr. Xu came to the United States to pursue further studies. He studied under Professor Erol Gelenbe at the University of Central Florida, focusing on neural networks. In just three years, he earned his Ph.D. with outstanding achievements. His research has since been cited more than 800 times by scholars in the field of artificial intelligence.
In early 2002, Dr. Xu joined the Department of Computer Science at Valdosta State University, where he devoted 24 years to teaching—one of the most significant chapters of his life. He received the university’s highest teaching honor, the Presidential Award for Excellence in Teaching, a direct testament to his dedication. He was deeply respected by both his colleagues and students.
Dr. Xu met his wife, Rong Wang, at Beijing University of Posts and Telecommunications, where they were classmates. They were married in Beijing in June 1998. Shortly after their marriage, they both moved to the United States for further study and eventually settled in Orlando, Florida. He is survived by his beloved family: his elder daughter, Liane (Xu Wangchu), 23, currently a graduate student in robotics and artificial intelligence at the Massachusetts Institute of Technology; and his younger daughter, Stella (Xu Shuyu), 20, currently a sophomore studying architecture at the University of Notre Dame. They were the greatest pride of his life.
The news of his passing came as a profound shock to his family, classmates, friends, colleagues, and students, all of whom mourn his loss deeply. A life of such talent and promise was taken too soon.
Dr. Xu, rest in peace. He will be deeply missed and forever remembered.
Tribute from His Colleagues
Dr. Zhiguang Xu devoted his career to teaching computer science with uncommon energy, curiosity, and care. For 24 years as a CS faculty member at Valdosta State University, he taught a wide range of courses, supervised student research, and continually renewed his own knowledge so that his students would be prepared for a rapidly changing field. He believed that successful computer science education required constant learning, unlearning, and relearning, and he modeled that spirit throughout his career by embracing emerging areas such as full-stack web development, Android programming, artificial intelligence, and parallel programming, while also bringing new tools and practices into the classroom.
He was especially known for the care and vision he brought to Senior Seminar, the department’s capstone course. Dr. Xu repeatedly redesigned the course to reflect current industry needs, giving students hands-on experience with modern languages, collaborative development tools, project management, and team-based software design. Under his guidance, the course became more than an academic requirement; it became a bridge to professional life. Former students credited the class with helping them secure their first jobs and with teaching lessons they carried throughout their careers, from technical discipline to teamwork, accountability, testing, and communication.
In recent years, Dr. Xu continued to play a leading role in shaping the direction of computer science education at Valdosta State University. He helped redesign and teach the department’s artificial intelligence course, ensuring that students were introduced to one of the most important and rapidly evolving areas of the discipline. He also provided leadership in establishing an AI track within the Bachelor of Science programs in Computer Science and Computer Information Systems, helping expand opportunities for students to pursue focused study in this growing field. His commitment to innovation was equally evident in his successful redesign of the parallel and distributed computing course, where students gained valuable hands-on experience by building Raspberry Pi–based clusters. Beyond the university, Dr. Xu served as Co-PI on the NSF EPIIC RAISE grant, through which he worked to spread AI knowledge more broadly in the community. These accomplishments, together with his many years of devoted teaching and mentorship, were recognized by Valdosta State University when he received its highest teaching honor, the Presidential Award for Excellence in Teaching.
Dr. Xu will also be remembered for his collegiality and generosity toward his fellow faculty members, especially those who were newer to the profession. He was a steady source of encouragement, advice, and mentorship, always willing to share his experience and to celebrate the success of others. On the very last day he was on campus, several of our computer science faculty members were walking back together from another colleague’s AI talk, and Dr. Xu walked with us. Along the way, he spoke with pride about the successful promotion and tenure of multiple faculty members. Before turning and heading back to his office, his last words to the group were full of the warmth and spirit that so often defined him: “We need to celebrate. Where is the party? Let’s go and party.” That moment now stands as a deeply cherished memory of his joy, his kindness, and his wholehearted investment in the people around him.
Above all, Dr. Xu will be remembered as a teacher, mentor, and colleague whose work changed lives. Through his dedication to his students, his generosity with his time and knowledge, and his constant effort to build meaningful opportunities for others, he leaves behind a lasting legacy in the department, the university, and the wider community. He will be deeply missed and gratefully remembered.
Tribute from His Classmates
The news of Zhiguang’s passing brought profound sorrow to all of us, his classmates from the Class of 1990 at Beijing University of Posts and Telecommunications. We mourn with heavy hearts and hold close the memory of a dear friend who was warm, open, sincere, and utterly dependable.
In 1990, Zhiguang entered the Department of Computer Science at Beijing University of Posts and Telecommunications, majoring in computer software, and began four precious years of university life. From the very beginning, he earned our trust and affection through his rigorous approach to learning and his strong sense of responsibility to the class. During his time at the university, he served as the class representative of Class 9048, fulfilling his duties with dedication, attention to detail, and remarkable reliability.
Academically, Zhiguang combined natural talent with tireless effort. He built a solid foundation in his field and approached his studies with seriousness and perseverance, consistently achieving excellent results. This strong foundation supported his future academic and professional achievements.
In everyday life, he was cheerful and outgoing, quick-witted, and sharp of mind. He had a natural gift for humor—able to dissolve awkward moments with a lighthearted remark and to lift everyone’s spirits with his infectious laughter. He was truly at the heart of our class. He treated others with sincerity and openness, maintained close and harmonious relationships with his dorm mates, and forged deep friendships through the rhythms of daily life. His warmth and genuineness made him an irreplaceable companion to many of us.
On the soccer field, Zhiguang was a celebrated forward on the Class of 1990 team. Fast on his feet, skillful in movement, and precise with his shots, he played with passion and determination, taking part in numerous matches and winning many honors for the class. Every sprint, every breakthrough, and every shot on goal reflected his dedication and love for the game, leaving us with vivid memories of our youth.
Throughout his life, he firmly upheld the belief of “setting a goal and moving forward with determination.” Whether in his studies or in life, once he chose a direction, he pursued it wholeheartedly and without hesitation. His perseverance and decisiveness left a deep and lasting impression on all who had the privilege of knowing him.
Though he has left us, his spirit lives on. May Zhiguang rest in peace, free from illness and at ease. He will forever remain in our hearts.
Tribute from His Friend
It was only several days after receiving a short text from a college friend—“Zhiguang is gone”—that the reality finally set in. I realized that, outside of my family, the person I had known and stayed connected with for the longest time had left us.
Forty-two years ago, on an early September day when I was just starting middle school, our teacher introduced Zhiguang, a new transfer student with pale skin and round glasses, to the class.
In the six years that followed, we became very close friends. Zhiguang was remarkably smart and hard-working. Although schoolwork came easily to him, he remained committed to achieving near-perfect scores in every subject. His curiosity, intelligence, and exceptional work ethic paved the way for his success in college and his eventual career as a respected professor in the United States.
He was also a talented soccer player who spent most of his spare time on the field, a passion he continued to pursue until the onset of the COVID-19 pandemic.
In private, he was at times extremely funny. He often mimicked comedy characters and delivered witty remarks with ease. We had so much fun during our teenage years, growing from rebellious boys into thoughtful young men. Zhiguang was determined to pursue his intellectual career. Our paths remained closely connected even after high school, as we were admitted to the same major at the same university. I still vividly recall the day we biked to campus together to see our future school; the excitement and hope on his face that day is a memory I will always cherish.
I spoke with Zhiguang in mid-March to discuss my upcoming trip to Orlando, and I was very much looking forward to seeing him. It is heartbreaking to realize that was our last conversation and that I was only a few days too late to see him one final time.
Zhiguang was so talented, energetic, and beloved by his family, friends, and students. He was a wonderful friend for over four decades, and he will be greatly missed.
Tribute from His Wife
Zhiguang was my beloved husband, the father of our two children, and the pillar of our family. His love for us was like a quiet, steady stream, present in the little moments of everyday life—in his reminders to us each morning after checking the weather forecast, and in his concern every evening that each member of the family had returned home safely.
Zhiguang was an exceptional and devoted father. From the moment our children were born until the very last days of his life, he was the warmest light in their hearts and the lighthouse they could look to whenever they felt lost. A father’s love is as steadfast as a mountain. When our children were born, he carefully learned from the nurses how to wash a newborn baby’s hair. On the very last day of his life, he went to our older daughter’s school to watch her rowing practice and helped our younger daughter search for research materials. The children’s acceptance into their dream universities owed much to his dedication. He devoted enormous time and energy to researching schools and academic programs for them.
Zhiguang loved photography, and because our family loved to travel, he naturally became our family photographer. I am especially grateful now that he always insisted on taking family photos during our travels. Those photographs have become some of our family’s most precious treasures. From now on, he no longer needs to worry over every detail of a photograph—the framing, the angle, the light, the background, the exposure. No one will rush him to pack up his equipment and move on to the next destination. From now on, every family photo of four will be missing one.
Zhiguang was witty and mischievously humorous. He was responsible for ninety percent of the laughter in our home. He was deeply knowledgeable, with stacks of books—both professional and humanistic—always by his bedside and on his desk, and he could effortlessly draw on references and stories from them. He loved to think deeply and enjoyed discussing philosophy, history, current events, and politics. Our home was often filled with the voices of the news and commentary programs he loved to follow, as well as the crosstalk performances of Guo Degang, which he never tired of listening to.
I am profoundly grateful for his unconditional love. We had known each other for nearly thirty-six years and were married for almost twenty-seven. Through all those years spent side by side, his love for me never changed. I was deeply blessed.
His passing was so sudden, and my heart aches for all that he will miss. He was someone who loved life, embraced technology, and looked to the future with excitement, yet he would never have the chance to witness the future of artificial intelligence unfold. All the plans we had made together came to an abrupt end. I had never imagined what he would look like growing old, his hair turned grey with age. Fate cruelly took away my chance to see that. I have lost my dearest companion.
Rest in peace, Zhiguang. I will carry forward his love, his passion for life, and his hope for the future, and I will continue to live fully and earnestly. I will watch our children grow, build families of their own, and find happiness. We will love him forever, and we will miss him always.
Forever loved, forever cherished.




















