Please introduce the Han nationality in China in English.

China is a big country, famous for its dense population and vast territory. There are 56 nationalities in China. The defining factors of an ethnic group are language, homeland and social values. 53 ethnic groups use their own languages, and 23 ethnic groups have their own scripts. According to the fifth national census in 2006, the population of Han nationality is159.4 million, accounting for 91.59% of the total population in China. The other 55 ethnic groups account for 8.4 1%, with a total of1064300 people. Since most of the population is Han nationality, the other 55 ethnic groups are customarily called ethnic minorities. Han people are all over the country, but mainly concentrated in the middle and lower reaches of the Yellow River, the Yangtze River and Pearl River basins and the Northeast Plain.