During the period of 1000 since the Song Dynasty, the population growth rate of Ruan was basically consistent with the national average growth rate. At present, the distribution in China is mainly concentrated in Zhejiang, Hubei, Guangdong and Fujian, accounting for about 50% of the total population of Ruan.
Secondly, it is distributed in Henan, Shaanxi, Jiangxi, Shandong and Jiangsu, accounting for about 26% of the total population of Ruan. Zhejiang is the largest province of Ruan, accounting for 15% of the total population of Ruan. Southeast and southern coastal areas and Hubei and Henan provinces have been formed throughout the country.
The population of Nguyen in Vietnam accounts for 40% of the total population, and it is the largest surname in Vietnam with a total population of nearly 40 million.