Most of the foreign students who entered the Tang Dynasty were children of middle-level officials of the Japanese ruling class, and they were closely related to the imperial court, so they were all valued when they returned to China. For example, Jing Daole studied the history of Confucian classics in imperial academy, Chang 'an, Tang Dynasty, and was appointed as a Japanese university teaching assistant after returning to China. Taking China as an example, he appealed to the emperor that Confucius was the king of propaganda, and got permission. This was the beginning of the Japanese government's respect for Confucius and promoted the development of Confucianism in Nara era in Japan. Yamato Nagaoka was born in a legal family and devoted himself to studying the laws of the Tang Dynasty after entering the Tang Dynasty. After returning home, he and Kibi No Asomi Makibi deleted Article 24 of the law. Ying Yuan studied medicine in the Tang Dynasty and made great achievements. After returning to China, he was appointed as an acupuncturist and made great contributions to the medical development in Japan.

Many Japanese students experienced the demise of the Sui Dynasty and the prosperity of the Tang Dynasty, and saw the influence of the advanced system of the Tang Dynasty on the surrounding areas. After they returned to China, they demanded the reform of Japan's ministerial system. In 645 AD, Emperor Kotoku of Japan appointed Gao Xiang, a returned student from the Tang Dynasty, as a doctor of traditional Chinese medicine in Hyunri, and made great innovations in Japan on the basis of imitating the political system of China in the Tang Dynasty.

Monks who studied abroad in the Tang Dynasty, like foreign students, played a great role in politics, culture and Buddhism after returning home. In addition to their own talents, monks studying abroad have a close relationship with court officials, which is also one of the basic conditions. Fang Xuan, the earliest monk who returned to China, was related to the Reformists and was highly valued. Most of the monks who returned from their studies in the Tang Dynasty made great contributions to spreading Buddhism and Tang culture and teaching. Daozhao, who went to study in the Tang Dynasty in 653 AD, studied Faxiangzong in China. After returning to China, he established a Buddhist temple in Nara secluded path and a Fa Xiang Sect in Japan. Zhizang, a monk studying abroad, and three schools of learning in the Tang Dynasty, and founded three schools after returning to Japan. Around 743 AD, various Buddhist sects, such as Huayan Sect, Faxiang Sect, Tiantai Sect and Zen Sect, were introduced to Japan, and new progress was made in architecture, sculpture and painting techniques related to Buddhism. As carriers of cultural exchanges between China and Japan, foreign students and monks have greatly promoted cultural exchanges between China and Japan.