This article is mainly based on the image link of how overseas Chinese think about mainland China, discussing how¡§CHINDIA¡¨ theory took shape by Sino-India scholar, Tan Yun-Shan and inherited by his son Tan Chung. To observe from the history, although the Tans live in the different background of environment and period, their proposition is still closely link with Chinese history. Tan Yun-Shan, an education scholar of overseas Chinese in early Republic of China, had developed Chinese culture in south Asia, was consequent invited to India by Tagore, and had done a cooperation of establish ¡§Cheena Bhavan¡¨. During Sino-Japanese Wars, Tan Yun-Shan advocate that China and India should against Japan together, he works as a translator between China and India, delver the important messages from Sino-India government to China government. After the War Tan Yun-Shan also worked hard dedicating the affairs of Cheena Bhavan and keep on develop the relationship between Sino-India and China, due to his great achievement we now respect Tan as ¡§Modern Xuanzang ¡¨. Tan Chung inherit the ideal of creating friendly relations between Sino-India and China from Tagore and his father, trying to find out the lost relationship between the two ancient civilizations China and India. By teaching in university of India, he found that there¡¦s possibly of China and India has the similar friendly civilization in his research of China history. Meanwhile, he also leads the spirits of critical western theory in India academic circle. After retired from India academia, Tan Chung his own Sino-India friendly relations academic theory was almost matured, Spread the theory of ¡§CHINDIA¡¨, face to ¡§the rising of China and India,¡¨ Tan Chung promote a peace development contribute world. As we could see, the Tans¡¦ proposition shows the importance of culture between China and India, they hope to practice the ideal of ¡§CHINDIA¡¨through the interactive of swooping culture and traditional habits .