Mr. Ji believes that the cultural exchange between China and North Korea has a long history, especially after Buddhism was introduced to China in 500 BC, it gained a firm foothold for the same reason and gradually expanded its influence, which not only penetrated into the hearts of the masses, but also penetrated into the core of China's traditional thought. If Buddhism had not been introduced into China, the development of China's philosophy would have been very different, which is hard for us to imagine. With the spread of Buddhism in China, profound Indian philosophy, literature and art were introduced. Therefore, the influence of Indian culture on China has become a well-known phenomenon, which is very prominent and hard to ignore. Therefore, Mr. Ji thinks: "Without studying the influence of Buddhism on China, it is impossible to write the true history of China culture, China philosophy and even China. The development of Buddhism in China is a very meaningful research topic. " These words are incisive and to the point. However, for a long time, the research in this field in China has lagged behind. In order to change this situation, Mr. Ji has devoted himself to this research for many years and published several important works such as Buddhism and Sino-Indian Cultural Exchange. However, cultural exchange is mutual and two-way. Therefore, Mr. Ji believes that "without mutual learning and exchanges between China and India, the cultural development of the two countries could not be what it is today." "He has done a lot of research on the influence of Indian culture on India, and published many books such as History of Sino-Indian Cultural Exchange and Sino-foreign Cultural Exchange, which filled the gap in this research field. Ji Xianlin's research in the past 60 or 70 years has covered a wide range of fields, which is rare at home and abroad, and it is difficult to sum it up in one sentence. There are many subjects involving cultural exchanges between India and China and India. Generally speaking, there are the following aspects: 1. Indian studies, 2. History of cultural exchange between China and India, 3. History of cultural exchange between China and foreign countries, 4. Indian literary classics and translation of Indian literature, 5. Comparative literature and folk literature. Prose creation, etc. In the study of Indian studies, Mr. Ji's achievements and contributions are second to none. It is the field where he has devoted the most effort, time and energy for decades. The so-called Indian studies include Indian linguistics, culturology, history, Buddhist teaching and so on. He is not only proficient in English, German, Sanskrit, Vedic, Pali and Northeastern, but also can read books such as French and Russian, which provides important conditions for him to engage in linguistic research. In the study of ancient Hindi, his outstanding contribution is to discover and prove the characteristics of various morphological changes of ancient Hindi. His thesis provides a reliable basis for judging the time, place and spread of Buddhist classics. He combined the study of Buddhist Sanskrit with the study of Indian Buddhist history, solved many problems in Indian Buddhist history, discovered the development law of Buddhist Sanskrit, made great contributions to enriching and developing linguistics, and was of great significance to the study of Indian language development history. Through the study of linguistics, he also promoted his own research on other disciplines. He closely combined the study of language with the exploration of Buddhist historical facts. When discussing the ancient Buddhist language, he was not strictly limited to the morphological changes of the language, but tried to explore what was hidden behind the morphological changes. Mr. Ji's extensive and meticulous research has achieved fruitful results, reached the international first-class level, is highly respected by scholars all over the world, and is highly valued by Sanskrit scholars and linguists all over the world. His representative works are Essays on Ancient Indian Languages, Language Problems of Primitive Buddhism, etc. In Indian culturology, Mr. Ji Xianlin has also made outstanding contributions. He clearly expounded the formation, characteristics, advantages and disadvantages of Indian culture, as well as the differences with western culture and China culture, and scientifically explained the prominent position and great influence of Indian culture in the world culture. He pointed out: "The two cultural circles of China and India learn from each other and influence each other, which promotes the development of each other's culture. This is history and reality. "This statement is true, hit the nail on the head. He not only introduced Indian culture, but also did a lot of research, which greatly promoted China's research on Indian culture and promoted cultural exchanges and mutual understanding between China and India. His representative works include Ji Xianlin on Indian Culture, Ancient Indian Culture and Essays on Cultural Exchange between China and India. Under his example and active advocacy, a number of academic works in China have come out one after another. In history, Mr. Ji's strategic thinking, distinguishing falsehoods while reserving differences and repeating new meanings is one of his research characteristics, such as the time and way when Indian Buddhism was introduced into China, which is one of the examples. Mr. Ji Xianlin advocates that the study of history should be based on "historical morality", seeking truth from facts and paying attention to textual research. " The purpose of textual research is seeking truth from facts, and truth is the essence of historical research. It is immoral to quote historical materials without doing research and realistic work, or to distort the original intention, or to cut the foot to fit the shoes, whether intentionally or unintentionally, and it is abhorrent to scholars with real conscience. "He also advocated that dogmatism should be avoided in historical research. He emphasized that "the most important thing in studying history is seeking truth, and it is absolutely not allowed to distort historical facts and cut off your feet to get a' theory' suitable for a certain dogmatism". He not only put forward his own views on the study of China history, but also expressed his own views on the study of Indian history. Regarding Indian history, Mr. Ji provided us with scientific theories and methods to study Indian history. He advocated dividing historical periods with historical materialism, determining social nature, and conducting research with a realistic attitude and scientific comparison methods. He personally set a brilliant example for China scholars. In addition to a brief history of India,1857-1859 Indian national uprising and other works, he also wrote many important academic works related to Indian history, such as a preliminary study of Ramayana, a history of cultural exchange between China and India, and a history of sugar. In these works, he didn't notice or solve many problems of his predecessors. In Buddhism teaching, Mr. Ji Xianlin is one of the few scholars at home and abroad who can really study Buddhism teaching with the original Buddhist scriptures. He used a large number of original materials such as Sanskrit, Pali, Buddhist Sanskrit, ancient Indian proverbs, China Buddhist scriptures, and discussed and debated with some international scholars on the language of primitive Buddhism, which finally corrected the wrong conclusions of some internationally renowned scholars and had great influence. His representative works include Language Problems of Primitive Buddhism, Essays on Ancient Indian Languages, Buddhism (Volume 7 of Ji Xianlin's Collected Works) and so on. In the study of Tuholo language, he filled the gap in this field in our country, attracted great attention from international academic circles and won honor for our country. The representative works are The Study of Tuholobi and the translation of Tuholobi Meets Maitreya (see Volume 7 of Ji Xianlin's Collected Works, 1 1). Buddhism was introduced to China from India, but it once "flowed back to India". This feedback phenomenon is little known. This is a very interesting phenomenon in the history of Indian Buddhism, in the history of cultural exchanges between China and India, and even in the history of world religions. Why this phenomenon occurs in Buddhism is of far-reaching significance to the study of the history of Buddhism, the history of cultural exchanges between China and India and the history of world religions. But so far, no Buddhist history or related books have seriously talked about this issue. Through the research and analysis of a large number of historical materials, Mr. Ji made an incisive exposition on the phenomenon and reasons of Buddhism's return to India, made a scientific conclusion on the historical facts of Buddhism's return to India, and explained this strange phenomenon, making new contributions to the enrichment and development of Buddhist teachings. See Ji Xianlin's Buddhist Academic Essays, etc.