Calculus (Volume 1)

Wang Yan: publicly available information is limited, and her full educational background, affiliation, and research focus cannot be confirmed at present. According to the library holdings, she is associated with the book Calculus (Volume 1), which is classified under exam preparation, indicating that its content is oriented toward exam review or course study and serves readers who need to systematically organize basic calculus knowledge. As an important introductory course in higher mathematics, calculus is known for its abstract concepts and high computational demands, and textbook writing often requires balancing rigorous definitions with accessible explanations. This work suggests that the author has invested effort in organizing and presenting fundamental mathematical content, with attention to structured knowledge points and learners' practical needs. Because verifiable personal information is scarce, no speculation is made about her academic experience, teaching background, or writing philosophy; this note records only her connection to exam-oriented mathematics materials based on the available work information, for readers' reference.

He Xing is an author about whom public information is currently limited; details such as his nationality, dates of birth and death, educational background, and professional positions have not been clearly recorded and remain to be verified. Judging from the three works held in the collection, his writing is mainly oriented toward university teaching and the growth and education of college students. These include Calculus (Volume One), a basic textbook for science and engineering courses, as well as practice-oriented books such as College Students' Self-Management Education and Practice and College Students' Labor Education, which focus on students' daily management and the cultivation of labor literacy. His works span two directions—exam preparation and educational practice—and are plain in language and practical in focus, centering on classroom teaching and the development of students' abilities. They are suitable for reference reading by university teachers, students, and educators.

Li Ling's publicly available information is limited, yet her writing and editorial work cover a notably broad range. The library holds thirteen of her titles, spanning biography, examination preparation, social culture, medicine, history, and finance. In biography, she has written the three-volume collection Meilanfang Fei as well as the standalone volume Meilanfang Fei: Mei Lanfang in Japan, both centering on the Peking opera master Mei Lanfang's experiences abroad; she is also the author of One Who Refuses to Be a Slave: A Biography of Nie Er, a life of the musician Nie Er. Her practical and instructional works include a cake decorating tutorial, Calculus (Volume One), an experimental guide for materials science, and a pre-service training manual for caregivers. She has also contributed to lighthearted popular history such as Ancient People Knew Better How to Have Fun. Judging from these titles, she handles both historical research and textbooks or popular writing with a practical style aimed at different readerships.